Article
Optics
Xuanyi Yu, Weiji Yang, Chongyang Shen, Wei Tao, Xiaoxu Deng
Summary: The fused silica subwavelength grating has been numerically investigated for its wavelength tunability and robustness of geometric deviation when applied to orthogonally polarized beams. Experimental results show that the fabricated grating achieves beam combining efficiencies of 82.9%, 80.3%, and 86.6% at wavelengths of 532 nm, 832 nm, and 1064 nm respectively, without anti-reflection coatings. Furthermore, the polarization beam combining method with the subwavelength grating can be used not only for combining diode laser arrays as pumping sources, but also for power enhancement in bulky laser systems used for laser cleaning, laser cutting, and laser shock peening.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Y. E. Geints, I. Minin, O. V. Minin
Summary: High-quality optical Fano resonances in spherical dielectric microparticles have extremal sensitivity to the micro-cavity size, shape, and optical properties of the material. The resonator material can exhibit strong optical nonlinearity due to the cubic nonlinearity and generation of free electron plasma. The competition between Kerr and plasma optical nonlinearities can reverse the Stokes shift observed in a pure Kerr medium, and optical ionization can reduce the strength and cause frequency splitting of the magnetic super-resonance.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Marcos Troncoso-Costas, Gaurav Jain, Yiming Li, Mohammed Patel, Lakshmi Narayanan Venkatasubramani, Sean O'Duill, Frank Smyth, Andrew Ellis, Francisco Diaz-Otero, Colm Browning, Liam Barry
Summary: In this work, a fast-switching tuneable laser capable of wide wavelength coverage, low noise and linewidth levels suitable for high-order modulation formats is demonstrated. The laser is characterized to cover a wavelength range of 35 nm in the C-band with nanosecond switching time. It is used to successfully demonstrate 480 Gbit/s 16QAM transmission over 25 km of single-mode fiber for a wavelength range of 19 nm.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Dehao Chen, Zhenwu Mo, Zehong Liang, Junjie Jiang, Huilin Tang, Yidan Sun, Ziyu Wang, Quanfeng Wei, Yanru Chen, Dongmei Deng
Summary: In this study, a novel family of elliptical Airyprime vortex beams (EAPVBs) is introduced, which inherits the excellent self-focusing properties of the circular Airyprime vortex beam (CAPVB). The asymmetric focusing of EAPVB leads to some novel properties, such as the splitting of high-order optical vortex and the formation of two foci. By taking advantage of these properties, EAPVB is constructed as a tunable optical bottle for particle capture.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiao Ma, Qiongchan Shao, Jian-Jun He
Summary: In this study, an SHS chip based on Su8 waveguide was designed and fabricated. By physically adjusting the metal electrodes and compensating for transmissivity fluctuations, the generation of side ripples was successfully suppressed.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Peng Sun, Qiang Zhao, Yunzhou Li, Shixuan Liu, Chenxi Su, Junfeng Jiang, Maojin Yun, Yong Zhao, Juncheng Wang
Summary: In this study, a high-quality dual-resonance sensor based on an all-dielectric metasurface is presented for simultaneous refractive index and temperature sensing. The sensor exhibits excellent performance with high sensitivity and a good linear relationship, making it suitable for applications such as temperature and salinity measurement in unstable environments.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Jun Wang, Lin Ke, Ming Cheng, Haiyan Yu
Summary: This paper numerically investigates the existence, stability, and transmission characteristics of multi-peak solitons in parity-time (PT) symmetric composite Mathieu lattices in self-focusing Kerr nonlinear media. The results show that these multipeak solitons are highly sensitive to the incident light power, position, and phase, and generate solitons with different transmission characteristics, especially the generation of breather soliton transmission characteristics.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Rui Qiu, Guanmao Zhang, Shaokai Du, Jie Liu, Hongyu Jib, Kaiyun Bi, Bochuan Xing, Guangchao Diao
Summary: Recent research has developed an achromatic metalens that shows potential for replacing traditional lenses. This study focuses on a continuously variable focus height broadband achromatic metalens for long-wavelength infrared applications. By optimizing materials and parameters, chromatic aberration is effectively corrected, making it suitable for high-resolution LWIR imaging and spectroscopy systems.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Feng Xiong, Jin Zhang, Yibei Wang, Anle Wang, Xiaotong Liu, Pengfei Du, Daikun Zheng, Xiaoniu Peng, Yalan Wang
Summary: We propose and experimentally demonstrate a dual-band tunable microwave pulse signals generation method based on a time domain mode locked optoelectronic oscillator (TDML-OEO). The method relies on injecting two single-tone signals and a low frequency signal to generate dual-band radio frequency (RF) combs with variable repetition rates and ultra-high suppression of noise. The proposed method has potential applications in multiband radars and electronic warfare.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Haogong Liu, Xiang-an Yan, Xiaoxiang Han, Haowei Ti, Xixi Bai, Zhou Guo, Xiaorui Huang, Chenjie Wang, Dandan Zhang
Summary: This study investigates the effect of neighboring transitions on the transformation between EIT and TPA. The results show that avoiding neighboring effects due to Doppler broadening in a real atom, as well as increasing the decay rate of the excited state and the hyperfine transition strength ratio between the coupling and probe lasers, are crucial factors for enhancing the transformation efficiency and resolution.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Sonu Kumar Rao, Naveen K. Nishchal, Ayman Alfalou
Summary: We propose an asymmetric image encryption scheme using chaotic phase masks and vectorial light field. This scheme creates two levels of security, encrypting a binary image in the first level using two different chaotic phase masks and encoding the phase-truncated part into a vectorial light field in the second level. The proposed approach ensures stronger security and ease of implementation.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Junjie Zhang, Wenjun Li, Bingtao Li, Zheng-Da Hu, Jicheng Wang, Feng Zhang, Lei Wang
Summary: A multilayer thin film device structure based on Tamm plasmons is proposed for high-performance near-infrared hot electron photodetectors. By optimizing the device structure parameters, high responsivity detection can be achieved.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Shuiwang Wang, Ye Ding, Yuan Li, Congcong Ge, Wanda Xie, Haodong Huo, Lijun Yang, Wei Zhang, Youqing Lu
Summary: A theoretical model is proposed and validated to describe the interaction between Water-Jet Guided Laser (WJGL) and nickel-based superalloy in this study. The evolution of ablation morphology is investigated using numerical simulation and experimental data. The influence rule of machining parameters on microscopic groove morphology is established through orthogonal experiments. The optimized scanning trajectory for high-quality cutting is determined using multi-row cutting experiments.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Bin Hu, Jianhai Han, Junhua Wang, Xiangpan Li
Summary: A mathematical model is proposed to predict the track cross-section profile for wide-band laser cladding. The accuracy of the model is improved by considering the melt pool morphology and powder spatial concentration. The experimental results show that the model can well predict the melt pool width, length, cross-sectional area, as well as the powder efficiency and cladding layer morphology.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
M. A. Lavrukhin, P. A. Bokhan, P. P. Gugin, Dm. E. Zakrevsky
Summary: An experimental study was conducted on the transitions of laser in alkaline earth metals, revealing that laser energy reaches a steady state mode within the pulse and achieves a steady state value of 59 mJ with an average output power of 5.3 W when the pulse frequency is 90 kHz. The experiments show that the energy characteristics of the Ca+ laser are comparable to those of lasers in other metals at a pulse repetition frequency of 100 kHz or higher.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Luis Omenaca, Mikel Gomez-Aranzadi, Isabel Ayerdi, Enrique Castano
Summary: In this paper, a numerical study and experimental validation of the ultrashort single pulse ablation process in aluminum have been conducted, providing a more precise understanding of the thermophysical and optical properties during material heating and ablation.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Qianglong Li, Feng Li, Hongjun Liu, Wei Zhao, Hualong Zhao, Yishan Wang, Wenlong Wen, Xue Cao, Jinhai Si
Summary: A compact all-fiber laser source with short pulse durations and excellent performance is demonstrated using fiber quasi-rectangular pulse pre-shaping technique. The laser source is compact, robust, cost-effective, and anticipated to be widely used in industrial applications.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Xinhu Fan, Youmin Rong, Guojun Zhang, Congyi Wu, Yuxuan Luo, Yu Huang
Summary: Ultrafast laser direct writing technology has been extensively studied in the fabrication of glass-based microfluidic devices. This study investigates the impact of scanning strategies and process parameters on the cross-sectional profile characteristics of microchannels. A new strategy, combining the offset method with the double bidirectional method, is proposed to achieve symmetrical cross-sectional profiles and smooth channel bottoms. The results demonstrate high-quality profiles of microchannels exhibit high efficiency and stability of flow in mixing experiments.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Pan Liu, Yongqiang Zhao, Ning Li, Kai Feng, Seong G. Kong, Chaolong Tang
Summary: This article presents a technique for inverse design of multilayer deep-etched gratings (MDEG) using a deep neural network with adaptive solution space. The proposed method trains a deep neural network to predict the probability distribution across the discretized space, enabling evaluation of an optimal solution. The results show improved efficiencies using only a reduced dataset and avoiding one-to-many mapping challenges.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Zengxuan Jiang, Minghao Chao, Qingsong Liu, Bo Cheng, Guofeng Song, Jietao Liu
Summary: In this paper, a multi-focal metalens with high focusing efficiency controlled by circular polarization multiplexing is demonstrated. The metalens can generate four transversely distributed focal points under normal incidence of linearly polarized light, supporting both left-circularly polarized and right-circularly polarized conversion. Furthermore, an oblique incidence metalens is designed to achieve high total focusing efficiency for terahertz waves and provides potential new applications for polarization imaging and detection.
OPTICS AND LASERS IN ENGINEERING
(2024)
