☆ 4.6 Review

Recent advances in laser self-injection locking to high-Q microresonators

FRONTIERS OF PHYSICS (2023)

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Widely tunable and narrow-linewidth chip-scale lasers from near-ultraviolet to near-infrared wavelengths

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Summary: We demonstrate a chip-scale visible laser platform that achieves tunable and narrow-linewidth lasers from near-ultraviolet to near-infrared wavelengths. Our lasers have achieved specifications previously only possible with large benchtop laser systems, making them a powerful tool for the next generation of visible-light technologies.

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Exceptional-point-enhanced Brillouin micro-optical gyroscope based on self-injection locking

Yonggang Zhang et al.

Summary: We propose a novel exceptional point (EP)-enhanced Brillouin micro-optical gyroscope (BMOG) using the self-injection locking technique with a small-size, low-cost, and low-power distributed feedback (DFB) semiconductor laser. This technique simplifies the frequency locking mechanism, reduces the cost and size of the laser, and meets the gyroscope's needs with narrowed linewidth. Compared to traditional micro-optic gyroscopes, BMOG operating near an EP demonstrates an increase in sensitivity for angular velocity sensing. This high-sensitivity, low-cost, low-power, and small-size BMOG scheme has potential for integration and engineering applications.

OPTICS COMMUNICATIONS (2023)

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Optimization of laser stabilization via self-injection locking to a whispering-gallery-mode microresonator: experimental study

Artem E. Shitikov et al.

Summary: Self-injection locking of a diode laser to a high-quality-factor microresonator is commonly used for frequency stabilization and linewidth narrowing. The study investigated the dependence of the stabilization coefficient on tunable parameters and demonstrated precise control of the locked frequency through the locking phase. Furthermore, the study showed the possibility of fast continuous and linear frequency modulation through injection current tuning within the self-injection locking regime. They conceptually demonstrated coherent frequency-modulated continuous wave LIDAR and achieved accurate velocity measurements.

OPTICS EXPRESS (2023)

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Article Optics

Compact sub-hertz linewidth laser enabled by self-injection lock to a sub-milliliter FP cavity

Wei Liang et al.

Summary: This study reports a compact narrow linewidth laser (NLL) of 67-mL volume, achieved by self-injection lock (SIL) of a diode laser to a miniature Fabry-Perot cavity. The laser exhibits a Lorentzian linewidth of 60 mHz and an integrated linewidth of about 80 Hz, outperforming commercial NLLs and recently reported hybrid-integrated NLL. This work represents a significant step towards field-deployable NLLs with superior performance using ultrahigh-quality Fabry-Perot cavities.

OPTICS LETTERS (2023)

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Article Optics

Integrated Chalcogenide Photonics for Microresonator Soliton Combs

Di Xia et al.

Summary: Integrated nonlinear photonics, with favorable optical materials, provide a potential platform for highly compact and high-intensity nonlinear interactions. In this work, a newly developed chalcogenide glass-Ge25Sb10S65 (GeSbS) is presented for nonlinear photonic integration and dissipative soliton microcomb generation. Chip-integrated optical microresonators with lithographically controlled dispersion engineering are implemented to generate both bright soliton-based and dark-pulse combs.

LASER & PHOTONICS REVIEWS (2023)

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Article Optics

Integrated, Ultra-Compact High-Q Silicon Nitride Microresonators for Low-Repetition-Rate Soliton Microcombs

Zhichao Ye et al.

Summary: The generation of sub-50GHz soliton microcombs in dispersion-engineered silicon nitride microresonators has been achieved by implementing an optimized racetrack design, minimizing coupling to higher-order modes and reducing the footprint size significantly. These devices feature a statistical intrinsic quality factor of 19 million and have successfully generated soliton microcombs at repetition rates of 20.5 and 14.0 GHz. The fabrication process is entirely subtractive, allowing direct patterning on the silicon nitride film.

LASER & PHOTONICS REVIEWS (2022)

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Article Optics

Quantum optics of soliton microcombs

Melissa A. Guidry et al.

Summary: This study utilizes second-order photon correlations to investigate the quantum processes of soliton microcombs in an integrated silicon carbide microresonator, showing that a stable temporal lattice of solitons can achieve all-to-all entanglement.

NATURE PHOTONICS (2022)

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Stability in self-injection locking of the DFB laser through a fiber optic resonator

Jingtong Geng et al.

Summary: This paper theoretically and experimentally analyzes the stability of self-injection locking in a resonant optical gyroscope, showing that the technique can achieve high frequency stability without active electrical feedback under certain parameters. However, it also points out the sensitivity of this technique to system parameters and environmental disturbances.

OPTICS COMMUNICATIONS (2022)

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Article Optics

Narrow linewidth self-injection locked fiber laser based on a crystalline resonator in add-drop configuration

Jingru Ji et al.

Summary: In this study, we present a narrow linewidth SH fiber laser that utilizes two tapered fibers and a high-Q MgF2 crystalline whispering-gallery-mode resonator. By controlling the feedback from the drop port, stable single longitudinal mode (SLM) operation of multi-mode fiber lasers is achieved. The experimental results demonstrate a stable single-frequency fiber laser with ultra-low white frequency noise and instantaneous linewidth. This compact, controllable, and all-fiber configuration for ultra-narrow linewidth laser is of great significance in various applications.

OPTICS LETTERS (2022)

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Article Optics

Thermal noise reduction in soliton microcombs via laser self-cooling

Fuchuan Lei et al.

Summary: Thermal noise dominates the low-frequency region of optical phase noise in soliton microcombs, limiting applications. Laser cooling with a pump laser can mitigate this noise by simultaneously exciting two neighboring cavity modes from different families.

OPTICS LETTERS (2022)

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Article Engineering, Electrical & Electronic

Gain-Switched Optical Frequency Comb Source Using a Hybrid Integrated Self-Injection Locking DFB Laser

Shuai Shao et al.

Summary: This study presents a hybrid integrated gain-switched optical frequency comb source with eight pure continuous comb lines, a narrow linewidth, and a large frequency spacing adjustment range. By coupling a silicon nitride microring reflector to a commercially available distributed feedback laser, the self-injection locking effect greatly enhances the carrier-to-noise ratio and phase correlation between comb lines. This cost-efficient and robust comb source has potential applications in areas such as radio over fiber and coherent optical communication.

IEEE PHOTONICS JOURNAL (2022)

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All-optical dissipative discrete time crystals

Hossein Taheri et al.

Summary: This study demonstrates a dissipative discrete time crystal in a Kerr-nonlinear optical microcavity. By utilizing self-injection locking of two independent lasers, this system enables the realization of defect-carrying DTCs and phase transitions. This room-temperature system paves the way for chip-scale time crystals with practical applications.

NATURE COMMUNICATIONS (2022)

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Article Optics

Dual-laser self-injection locking to an integrated microresonator

Dmitry A. Chermoshentsev et al.

Summary: In this study, we experimentally demonstrate the dual-laser self-injection locking (SIL) of two multifrequency laser diodes to different modes of an integrated microresonator. The simultaneous spectrum collapse of both lasers, as well as the narrowing of linewidth and suppression of high-frequency noise, are observed. The strong nonlinear interaction between the two fields is also observed. Locking both lasers to the same mode results in simultaneous frequency and phase stabilization and coherent addition of their outputs. Additionally, a comprehensive dual-SIL theory is provided, and the influence of lasers on each other caused by nonlinear effects in the microresonator is investigated.

OPTICS EXPRESS (2022)

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Efficient Kerr soliton comb generation in micro-resonator with interferometric back-coupling

J. M. Chavez Boggio et al.

Summary: The authors engineer a hybrid Mach-Zehnder micro-ring resonator to achieve an 80% pump-to-comb conversion efficiency based on dissipative Kerr solitons, increasing the efficiency and maximizing the utilization of pump power.

NATURE COMMUNICATIONS (2022)

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Platicon microcomb generation using laser self-injection locking

Grigory Lihachev et al.

Summary: The past decade has seen significant advances in the development and system-level applications of photonic integrated microcombs, with the use of both dissipative Kerr solitons (DKS) and platicons. Unlike DKS microcombs that require specific designs and fabrication techniques, platicon microcombs can be easily built using CMOS-compatible platforms. This study demonstrates a fully integrated platicon microcomb using laser self-injection locking, potentially enabling widespread adoption of microcombs in photonic integrated circuits through commercial foundry service.

NATURE COMMUNICATIONS (2022)

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Review Optics

Silicon nitride passive and active photonic integrated circuits: trends and prospects

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Summary: The use of silicon nitride in integrated photonics has made rapid progress in recent decades. It is a promising platform for nonlinear and microwave photonics, with potential applications in various fields. The integration of III-V materials with silicon nitride has enabled advanced photonic integrated circuits with versatile functionality. Future development should address the ultimate limits and challenges of silicon nitride-based photonic devices.

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Stimulated generation of deterministic platicon frequency microcombs

Hao Liu et al.

Summary: Significant progress has been made in the generation of dissipative Kerr solitons in chip-scale nonlinear resonators, offering a wide range of applications. In this study, square pulse formation in the normal dispersion regime is achieved, and its tuning is demonstrated through modulation frequency. Experimental and modeling results confirm the observation of platicon pulses with different widths.

PHOTONICS RESEARCH (2022)

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Near ultraviolet photonic integrated lasers based on silicon nitride

Anat Siddharth et al.

Summary: Low phase noise lasers based on III-V semiconductors and silicon photonics have been widely used in the near-infrared spectral regime. Recent advancements in low-loss silicon nitride-based photonic integrated resonators have surpassed external diode and fiber lasers in terms of phase noise and frequency agility in the 1550 nm-telecommunication window. In this study, we demonstrate a hybrid integrated laser composed of a gallium nitride-based laser diode and a silicon nitride photonic chip-based microresonator operating at ultra-low wavelengths down to 410 nm in the near-ultraviolet wavelength region, which is suitable for atomic transitions addressing in applications such as atomic clocks, quantum computing, or underwater LiDAR. By self-injection locking of the Fabry-Perot diode laser to a high-Q photonic integrated microresonator, we achieve more than 100x reduction in optical phase noise at 461 nm, limited by the device quality factor and back-reflection.

APL PHOTONICS (2022)

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Article Physics, Multidisciplinary

Compact, spatial-mode-interaction-free, ultralow-loss, nonlinear photonic integrated circuits

Xinru Ji et al.

Summary: This study adapts and optimizes Euler bends to build compact racetrack microresonators based on ultralow-loss, multi-mode, silicon nitride photonic integrated circuits. The researchers quantitatively investigate the suppression of spatial mode interaction and demonstrate the preservation of low optical loss in the microresonators. The optimized Euler bends and racetrack microresonators have potential applications in integrated nonlinear photonic systems and photonic quantum computing.

COMMUNICATIONS PHYSICS (2022)

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Article Optics

Soliton formation and spectral translation into visible on CMOS-compatible 4H-silicon-carbide-on-insulator platform

Chengli Wang et al.

Summary: Researchers demonstrate the generation of a single soliton microcomb on high-quality-factor microresonators fabricated on 4H-SiC-on-insulator thin films. They also observe wide spectral translation of chaotic microcombs from near-infrared to visible due to the second-order nonlinearity of SiC. This highlights the potential of SiC as a platform for future low-loss integrated nonlinear and quantum photonics.

LIGHT-SCIENCE & APPLICATIONS (2022)

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High-Sensitivity Demodulation of Fiber-Optic Acoustic Emission Sensor Using Self-Injection Locked Diode Laser

Farzia Karim et al.

Summary: In this study, a self-injection locked distributed feedback diode laser and a fiber-coil Fabry-Perot interferometer sensor were used for high-sensitivity detection of acoustic emission. Improved demodulation method and identification of mode-hopping events were employed to enhance the signal-to-noise ratio and reduce spurious signals.

IEEE PHOTONICS JOURNAL (2022)

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A continuum of bright and dark-pulse states in a photonic-crystal resonator

Su-Peng Yu et al.

Summary: This study demonstrates a continuum from dark pulse to bright pulse states in a Kerr-nonlinear resonator with normal dispersion and photonic crystal ring resonators, and explores the underlying mechanism and physical roles.

NATURE COMMUNICATIONS (2022)

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Low-noise frequency-agile photonic integrated lasers for coherent ranging

Grigory Lihachev et al.

Summary: The authors present a narrow linewidth hybrid photonic integrated laser with low noise and fast wavelength tuning, and demonstrate its application in FMCW LiDAR. This integrated laser features narrow linewidth and high tuning speed, making it suitable for scenarios requiring high compactness and spectral purity.

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Spectral Purity Improvement in Flickering Self-Injection Locked Lasers

Anatoliy Savchenkov et al.

Summary: We studied improvements of the phase noise and integral linewidth of the self-injection locked distributed feedback semiconductor laser. Through our experiment, we validated theoretical formulas and showed that self-injection locking can effectively reduce laser noise over a wide frequency range.

IEEE JOURNAL OF QUANTUM ELECTRONICS (2022)

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Hybrid Integrated Dual-Microcomb Source

Nikita Yu. Dmitriev et al.

Summary: Dual-comb interferometry is a method that converts the optical spectrum into the radio-frequency domain using self-heterodyning two optical frequency combs. It has diverse applications including metrology, spectroscopy, distance ranging, and optical communications. Current systems rely on scientific equipment and bulky mode-locked lasers, but this study demonstrates a power-efficient dual-microcomb source that is fully integrated and electrically driven, providing a more compact and cost-effective solution.

PHYSICAL REVIEW APPLIED (2022)

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Chip-based laser with 1-hertz integrated linewidth

Joel Guo et al.

Summary: This work demonstrates a laser system with a 1.1 Hz linewidth and fractional frequency instability below 10^(-14) in 1 second. By utilizing integrated lasers and microfabricated mirrors, this system achieves low-noise performance and holds potential for high-volume manufacturing.

SCIENCE ADVANCES (2022)

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Article Optics

Self-regulating soliton switching waves in microresonators

Heming Wang et al.

Summary: This paper investigates the formation process of dark pulses triggered by self-injection locking in dissipative soliton Kerr frequency combs. It is found that the self-injection locking mechanism allows for the control of the position and duty cycle of the dark pulses, enabling access to a wide range of comb states. The shape of the dark pulses is also imaged using the linear optical sampling technique. These results provide important insights and operational modalities for understanding and utilizing this important class of nonlinear waves.

PHYSICAL REVIEW A (2022)

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Proceedings Paper Engineering, Electrical & Electronic

Strong-feedback regime of self-injection locking and external cavity laser

Nikita M. Kondratiev et al.

Summary: Realizing the coupling of the laser diode to an external reflector can effectively suppress phase noises and stabilize the laser source. Locking a semiconductor laser to a high-quality-factor microresonator can narrow the laser linewidth. This study develops a more complete theory of the laser - resonant reflector interaction to describe this effect for high feedback levels.

SEMICONDUCTOR LASERS AND LASER DYNAMICS X (2022)

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Pockels soliton microcomb

Alexander W. Bruch et al.

Summary: Kerr soliton microcombs have been a popular topic in integrated photonics, but Pockels soliton microcombs driven by quadratic photonic materials show unique advantages in nanophotonic platforms, with high soliton generation fidelity and efficient pump-to-soliton conversion.

NATURE PHOTONICS (2021)

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Article Optics

Laser stabilization to a cryogenic fiber ring resonator

Benjamin Merkel et al.

Summary: Researchers have achieved a first-order temperature-insensitive point at around 3.55K using a fiber-based ring resonator, with lower sensitivity to vibrations, temperature, and pressure changes. This approach shows promise for future precision experiments.

OPTICS LETTERS (2021)

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Article Multidisciplinary Sciences

Dynamics of soliton self-injection locking in optical microresonators

Andrey S. Voloshin et al.

Summary: Soliton microcombs, formed through pump laser self-injection locking, have relaxed the requirements for external laser drives. The Kerr nonlinearity of the microresonator significantly affects the behavior of the laser diode and the locking dynamics, leading to a red-detuned laser emission frequency. The study provides insights for building electrically driven integrated microcomb devices with full control of the dynamics of laser self-injection locking.

NATURE COMMUNICATIONS (2021)

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Article Optics

Robust, efficient, micrometre-scale phase modulators at visible wavelengths

Guozhen Liang et al.

Summary: The study presents visible-spectrum silicon nitride thermo-optic phase modulators based on adiabatic micro-ring resonators, which offer a one-order-of-magnitude reduction in both device footprint and power consumption compared to waveguide phase modulators. These modulators provide 1.6 pi phase modulation with minimal amplitude variations and improved robustness against fabrication variations.

NATURE PHOTONICS (2021)

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Article Optics

Discretely tunable, single mode lasing from a multimode diode laser, locked to silica microsphere resonator

E. Yacoby et al.

Summary: By locking a semiconductor laser to a microresonator, researchers were able to achieve spectral narrowing and reduce power loss, resulting in a simple, affordable, and compact tunable single mode laser device.

OPTICS AND LASER TECHNOLOGY (2021)

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Article Optics

Simultaneous self-injection locking of two VCSELs to a single whispering- gallery-mode microcavity

Lidan Jiang et al.

Summary: Simultaneous self-injection locking of two VCSELs to a single microcavity is demonstrated, reducing linewidths and suppressing frequency noises effectively. This method may be applied to multi-wavelength laser arrays with low phase and frequency noise.

OPTICS EXPRESS (2021)

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Article Optics

Reaching fiber-laser coherence in integrated photonics

Bohan Li et al.

Summary: The hybrid integrated laser achieved a frequency noise floor of 0.006 Hz(2)/Hz at 4 MHz offset, with a Lorentzian linewidth below 40 mHz, and frequency noise of 200 Hz(2)/Hz at 100 Hz offset. This performance exceeds commercially available, high-performance fiber lasers and marks a milestone in integrated photonics development.

OPTICS LETTERS (2021)

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Article Multidisciplinary Sciences

Quantum circuits with many photons on a programmable nanophotonic chip

J. M. Arrazola et al.

Summary: The newly introduced photon quantum computing system is capable of executing multiple quantum algorithms, surpassing the limitations of existing photon quantum computers, with significant breakthroughs in detecting the quantity and rate of multi-photon events. The platform validates the application prospects of photon technologies in quantum information processing, particularly in the breakthroughs brought by high squeezing and sampling rates.

NATURE (2021)

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Hertz-linewidth semiconductor lasers using CMOS-ready ultra-high-Q microresonators

Warren Jin et al.

Summary: Highly coherent electrically pumped integrated lasers with ultra-high-Q microresonators have been demonstrated, achieving a frequency noise of 0.2 Hz(-1) and a short-term linewidth of 1.2 Hz. This configuration not only relieves dispersion requirements but also enables superior optical performance driven by narrow-linewidth bench-top lasers.

NATURE PHOTONICS (2021)

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Article Optics

Narrow-linewidth self-injection locked diode laser with a high-Q fiber Fabry-Perot resonator

Liyun Hao et al.

Summary: The study demonstrates a self-injection locked diode laser with a high quality factor fiber Fabry-Perot resonator, achieving a 145 Hz free-running linewidth. The locking scheme is all-fiber, reducing white frequency noise to 50 Hz(2)/Hz with over 42 dB reduction, showing wide applications in a compact and cost-effective way.

OPTICS LETTERS (2021)

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Article Chemistry, Analytical

Application of Dual-Frequency Self-Injection Locked DFB Laser for Brillouin Optical Time Domain Analysis

Cesar A. Lopez-Mercado et al.

Summary: Self-injection locking to an external fiber cavity is an efficient technique that drastically narrows the linewidth of semiconductor lasers, enabling the construction of a dual-frequency laser source with performance comparable to commonly used BOTDA laser modules. This low-cost solution allows for distributed measurements of Brillouin frequency shift in a 10 km sensing fiber with a spatial resolution of 1.5 m, simplifying the BOTDA system by avoiding the need for a broadband electrooptical modulator and high-frequency electronics.

SENSORS (2021)

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Article Multidisciplinary Sciences

High-performance lasers for fully integrated silicon nitride photonics

Chao Xiang et al.

Summary: Achieving high output power and low noise integrated lasers using Si/SiN heterogeneous platform with Hertz-level linewidth has been demonstrated. This paves the way for fully integrating low-noise silicon nitride photonics in volume. The high-performance lasers on SiN with tens of milliwatts output power and sub-kHz fundamental linewidth address issues of mode transition loss, cavity design, and fabrication process, marking a milestone towards fully integrated low-noise silicon nitride photonics platform.

NATURE COMMUNICATIONS (2021)

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Article Physics, Applied

Mirror-Assisted Self-Injection Locking of a Laser to a Whispering-Gallery-Mode Microresonator

Ramzil R. Galiev et al.

Summary: A study was conducted on a scheme of self-injection locked laser (SIL) via a high-Q microresonator, utilizing a drop-port coupled mirror to optimize optical feedback; it was found that an additional reflector can improve laser stabilization and power handling efficiency.

PHYSICAL REVIEW APPLIED (2021)

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Integrated reference cavity with dual-mode optical thermometry for frequency correction

Qiancheng Zhao et al.

Summary: Photonics integrated resonators have advantages in size, weight, and cost, but are sensitive to temperature fluctuations and external disturbances. By implementing dual-mode optical thermometry in a high-Q silicon nitride resonator, temperature sensitivity can be reduced, promising solutions for quantum, metrology, and optical communications applications.

OPTICA (2021)

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Article Physics, Multidisciplinary

Tunable single-mode chip-scale mid-infrared laser

Euijae Shim et al.

Summary: This study demonstrates a tunable, single-mode mid-IR laser at 3.4 μm using a tunable high-Q silicon microring cavity and a multi-mode Interband Cascade Laser. By utilizing self-injection locking, single-frequency lasing with 0.4 mW output power and a wide tuning range with high side mode suppression ratio were achieved.

COMMUNICATIONS PHYSICS (2021)

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Article Optics

Thermally induced generation of platicons in optical microresonators

Valery E. Lobanov et al.

Summary: The study demonstrates a novel mechanism for generating flat-top solitonic pulses, platicons, in optical microresonators under normal group velocity dispersion via negative thermal effects. Two regimes of platicon generation are identified based on the pump amplitude: smooth and oscillatory. Parameter ranges for platicon excitation are analyzed for different thermal relaxation times, frequency scan rates, and GVD coefficients, showing the possibility of turn-key generation.

OPTICS LETTERS (2021)

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Article Optics

Narrow linewidth VCSEL based on resonant optical feedback from an on-chip microring add-drop filter

Lidan Jiang et al.

Summary: A narrow linewidth vertical-cavity surface-emitting laser (VCSEL) with stable frequency was achieved by injecting resonant optical feedback into the lasing cavity, providing a high-performance light source for single VCSEL or VCSM array-based applications. The on-chip microring add-drop filter played a key role in achieving a Lorentzian linewidth of 32.6 kHz and a purified optical spectrum. The frequency noise spectrum of the VCSEL showed that the thermo-optic effect in the microring resonator helped stabilize the lasing frequency.

OPTICS LETTERS (2021)

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Article Multidisciplinary Sciences

High-yield, wafer-scale fabrication of ultralow-loss, dispersion-engineered silicon nitride photonic circuits

Junqiu Liu et al.

Summary: Recent advances in Si3N4 photonics have shown that ultralow-loss microresonators with Q factors exceeding 10^6 can be achieved, but current fabrication techniques are not suitable for certain applications. A new fabrication technology has been developed to produce microresonators with Q factors above 30 million and 1 dB/m optical losses, paving the way for improved performance and capabilities of integrated photonics.

NATURE COMMUNICATIONS (2021)

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Article Optics

Tantala Kerr nonlinear integrated photonics

Hojoong Jung et al.

Summary: Integrated photonics is essential for a wide range of modern scientific and technological advancements, and tantalum pentoxide (Ta2O5) has emerged as a promising material for integrated nonlinear photonics due to its low intrinsic stress, optical loss, and efficient Kerr nonlinear processes. Using >800 nm thick tantalum films deposited via ion beam sputtering, researchers have successfully fabricated integrated nonlinear resonators and waveguides with high optical quality factors, paving the way for future applications in ultrabroad bandwidth Kerr soliton frequency combs and supercontinuum generation.

OPTICA (2021)

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Article Optics

Athermal high-Q tantalum-pentoxide-based microresonators on silicon substrates

Tzyy-Jiann Wang et al.

Summary: The study investigated the effects of Ta2O5 film properties on the performance of microresonators, resulting in the design and fabrication of Ta2O5 microdisk resonators with low thermal drift and high quality factor, achieving high thermal stability.

OPTICS AND LASER TECHNOLOGY (2021)

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Article Optics

Modulation bandwidth enhanced self-injection locking laser with an external high-Q microring reflector

Shuai Shao et al.

Summary: The study introduces a hybrid modulation bandwidth enhanced self-injection locking laser by coupling a commercial distributed feedback laser with an external high-Q silicon nitride microring reflector. Through optimizing the parameters of the reflector, the modulation bandwidth and linewidth of the hybrid laser were successfully enhanced and narrowed.

OPTICS LETTERS (2021)

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Article Multidisciplinary Sciences

Laser soliton microcombs heterogeneously integrated on silicon

Chao Xiang et al.

Summary: Silicon photonics enables integration of optical functionalities on chip, and our approach of heterogeneously integrated laser soliton microcombs provides a route for large-volume, low-cost manufacturing of chip-based frequency combs. These devices can output single-soliton microcombs with a 100-gigahertz repetition rate and offer laser frequency noise reduction, showing potential for next-generation high-capacity transceivers, data centers, and mobile platforms.

SCIENCE (2021)

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Article Multidisciplinary Sciences

Aluminum nitride nanophotonics for beyond-octave soliton microcomb generation and self-referencing

Xianwen Liu et al.

Summary: The authors have introduced a solution for accessing octave soliton microcombs and self-referencing using aluminum nitride nanophotonic chips, which could potentially benefit applications such as precision metrology, molecular fingerprinting, and exoplanet discoveries. Through the use of aluminum nitride thin films, the microcomb stabilization has been achieved within the chip, paving the way for fully integrated self-locked microcombs for portable optical atomic clocks and frequency synthesizers.

NATURE COMMUNICATIONS (2021)

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Article Physics, Applied

Self-Injection Locking of a Gain-Switched Laser Diode

Artem E. Shitikov et al.

Summary: Experimental observations show that a gain-switched laser can self-injection lock to a high-Q optical microresonator, resulting in a significant reduction in comb-teeth linewidths. This setup enables the generation of high-contrast, electrically tunable optical frequency combs with narrow linewidths at the sub-kHz scale. Further studies are done on the characteristics of the generated combs under various modulation parameters and self-injection locking efficiency parameters.

PHYSICAL REVIEW APPLIED (2021)

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Overcoming thermo-optical dynamics in broadband nanophotonic sensing

Mingkang Wang et al.

Summary: Advances in integrated photonics have enabled the fabrication of high-sensitivity and broadband sensors, with a focus on overcoming thermal dynamics effects. Researchers have developed a frequency-dependent photonic sensor transfer function to accurately measure dynamic signals at high optical power levels.

MICROSYSTEMS & NANOENGINEERING (2021)

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Article Optics

Methods to achieve ultra-high quality factor silicon nitride resonators

Xingchen Ji et al.

Summary: This article discusses methods to achieve ultra-high quality factor on-chip resonators on a silicon nitride platform, including microfabrication processes, quality factor measurement, and improvement methods. It also explores the extraction of basic loss limits and a calculation model for scattering losses in waveguides and resonators.

APL PHOTONICS (2021)

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Article Optics

Compact Narrow Linewidth External Cavity Semiconductor Laser Realized by Self-Injection Locking to Fabry-Perot Cavity

Liu Yunfeng et al.

Summary: This study presented a compact 1550 nm external cavity diode laser (ECDL) based on a miniaturized FP cavity, achieving high performance narrow linewidth laser (NLL) for commercial applications. By optimizing the quality factor of the cavity and packaging technology, the laser demonstrated frequency noise comparable to the NKT E15 fiber laser.

CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG (2021)

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Proceedings Paper Engineering, Electrical & Electronic

Thermal Influence on laser self-injection locking to nonlinear microresonator

Nikita M. Kondratiev et al.

Summary: Self-injection locking is an effective tool for laser stabilization, but nonlinear and high power effects leading to thermal issues must be considered. Researchers have developed a new theory, showing that locking can help overcome temperature drift problems and change system behavior.

NONLINEAR OPTICS AND APPLICATIONS XII (2021)

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Article Optics

Thermal instabilities, frequency-comb formation, and temporal oscillations in Kerr microresonators

Amir Leshem et al.

Summary: Analyzing the consequences of dissipative heating in driven Kerr microresonators, we found that thermal sensitivity affects the stability range of continuous waves. By using a thermal Lugiato-Lefever model, we propose a deterministic access path that bypasses the thermal instability barrier. Additionally, we describe a thermal instability leading to thermo-optical oscillations via a Hopf bifurcation.

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Dalziel J. Wilson et al.

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Integrated turnkey soliton microcombs

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Thermal decoherence and laser cooling of Kerr microresonator solitons

Tara E. Drake et al.

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Greater than one billion Q factor for on-chip microresonators

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Hao Tian et al.

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Jingtong Geng et al.

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Kunpeng Jia et al.

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Yoshitomo Okawachi et al.

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Anatoliy A. Savchenkov et al.

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V. D. Vaidya et al.

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Meicheng Fu et al.

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Numerical study of solitonic pulse generation in the self-injection locking regime at normal and anomalous group velocity dispersion

Nikita M. Kondratiev et al.

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Microresonator and Laser Parameter Definition via Self-Injection Locking

Artem E. Shitikov et al.

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N. M. Kondratiev et al.

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Low-loss low thermo-optic coefficient Ta2O5 on crystal quartz planar optical waveguides

Qiancheng Zhao et al.

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Modulational instability and frequency combs in whispering-gallery-mode microresonators with backscattering

Nikita M. Kondratiev et al.

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Anatoliy A. Savchenkov et al.

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Influences of pump power and high-order dispersion on dual-pumped silicon-on-insulator micro-ring resonator-based optical frequency combs

Jin Wen et al.

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Photonic-chip-based frequency combs

Alexander L. Gaeta et al.

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Qi-Fan Yang et al.

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Arslan S. Raja et al.

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Xiaoxiao Xue et al.

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Heng Zhou et al.

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Zachary L. Newman et al.

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Superchannel engineering of microcombs for optical communications

Oskar B. Helgason et al.

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Jin Wen et al.

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Self-injection locking efficiency of a UV Fabry-Perot laser diode

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Gregory Moille et al.

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Searching for exoplanets using a microresonator astrocomb

Myoung-Gyun Suh et al.

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Ewelina Obrzud et al.

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Peter J. M. Van Der Slot et al.

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Jinkang Lim et al.

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Generation and dynamics of solitonic pulses due to pump amplitude modulation at normal group-velocity dispersion

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Soliton microcomb range measurement

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Prathamesh S. Donvalkar et al.

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Calcium fluoride whispering gallery mode optical resonator with reduced thermal sensitivity

Anatoliy Savchenkov et al.

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Spatial multiplexing of soliton microcombs

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Thermal and Nonlinear Dissipative-Soliton Dynamics in Kerr-Microresonator Frequency Combs

Jordan R. Stone et al.

PHYSICAL REVIEW LETTERS (2018)

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Tobias J. Kippenberg et al.

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Narrow-linewidth lasing and soliton Kerr microcombs with ordinary laser diodes

N. G. Pavlov et al.

NATURE PHOTONICS (2018)

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Spectrum collapse, narrow linewidth, and Bogatov effect in diode lasers locked to high-Q optical microresonators

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Ultralow-power chip-based soliton microcombs for photonic integration

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Tin Komljenovic et al.

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Dmitry V. Strekalov et al.

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Martin H. P. Pfeiffer et al.

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Barium fluoride whispering-gallery-mode disk-resonator with one billion quality-factor

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Thermo-optic coefficient of silicon at 1550nm and cryogenic temperatures

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Yang Zhao et al.

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Y. P. Bliokh et al.

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Developing self-mixing interferometry for instrumentation and measurements

Silvano Donati

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Chemically etched ultrahigh-Q wedge-resonator on a silicon chip

Hansuek Lee et al.

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General treatment of the thermal noises in optical fibers

Lingze Duan

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Jonathan Ward et al.

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Self-referenced stabilization of temperature of an optomechanical microresonator

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External cavity diode laser with kilohertz linewidth by a monolithic folded Fabry-Perot cavity optical feedback

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OPTICS LETTERS (2011)

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Microresonator-Based Optical Frequency Combs

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Whispering-gallery-mode-resonator-based ultranarrow linewidth external-cavity semiconductor laser

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OPTICS LETTERS (2010)

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High confinement micron-scale silicon nitride high Q ring resonator

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OPTICS EXPRESS (2009)

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Article Optics

Whispering-gallery-mode-resonator-stabilized narrow-linewidth fiber loop laser

B. Sprenger et al.

OPTICS LETTERS (2009)

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Article Physics, Applied

Compensation of thermal refraction effect in high-Q toroidal microresonator by polydimethylsiloxane coating

L. He et al.

APPLIED PHYSICS LETTERS (2008)

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Article Physics, Multidisciplinary

Fluctuation-dissipation theorem for thermo-refractive noise

Yuri Levin

PHYSICS LETTERS A (2008)

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Article Optics

Whispering-gallery-mode resonators as frequency references. II. Stabilization

Anatoliy A. Savchenkov et al.

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS (2007)

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Article Engineering, Electrical & Electronic

Experimental observation of frequency locking and noise reduction in a self-injection-locked magnetron

Jin Joo Choi et al.

IEEE TRANSACTIONS ON ELECTRON DEVICES (2007)

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Article Optics

Whispering-gallery-mode resonators as frequency references. I. Fundamental limitations

Andrey B. Matsko et al.

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS (2007)

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Article Optics

Optical resonators with ten million finesse

Anatoliy A. Savchenkov et al.

OPTICS EXPRESS (2007)

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Article Optics

Compact, thermal-noise-limited optical cavity for diode laser stabilization at 1 X 10-15

A. D. Ludlow et al.

OPTICS LETTERS (2007)

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Article Optics

Ultra high Q crystalline microcavities

Ivan S. Grudinin et al.

OPTICS COMMUNICATIONS (2006)

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Article Optics

Nonstationary nonlinear effects in optical microspheres

AE Fomin et al.

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS (2005)

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Article Optics

Fundamental thermal fluctuations in microspheres

ML Gorodetsky et al.

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS (2004)

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Article Optics

Kilohertz optical resonances in dielectric crystal cavities

AA Savchenkov et al.

PHYSICAL REVIEW A (2004)

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Article Optics

Dynamical thermal behavior and thermal self-stability of microcavities

T Carmon et al.

OPTICS EXPRESS (2004)

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Article Engineering, Electrical & Electronic

Stability analysis of self-injection-locked oscillators

HC Chang

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES (2003)

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Article Engineering, Electrical & Electronic

Phase noise in self-injection-locked oscillators - Theory and experiment

HC Chang

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES (2003)

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Article Optics

Diode laser coupled to a high-Q microcavity via a GRIN lens

VV Vassiliev et al.

APPLIED PHYSICS B-LASERS AND OPTICS (2003)

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Article Mechanics

Stress effects on the performance of optical waveguides

M Huang

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2003)

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Article Engineering, Electrical & Electronic

Frequency stabilisation of a diode laser by a whispering-gallery mode

AN Oraevskii et al.

QUANTUM ELECTRONICS (2001)

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Article Optics

Rayleigh scattering in high-Q microspheres

ML Gorodetsky et al.

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS (2000)

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