Temperature compensated fiber optic magnetic sensor based on the combination interference principle

Article Optics

Enhanced sensitivity of optical fiber vibration sensor based on radio-frequency Michelson interferometer

Ming Deng et al.

Summary: By adjusting the power ratio of the two beams in the interferometer and the driving frequency of the modulator, the phase sensitivity of the sensor can be improved, enhancing the sensitivity of the optical fiber vibration sensor.

OPTICS LETTERS (2021)

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Article Optics

High-sensitivity special open-cavity Mach-Zehnder structure for salinity measurement based on etched double-side hole fiber

Ziting Lin et al.

Summary: This study presents a special open-cavity Mach-Zehnder salinity sensor with advantages in salinity sensitivity and loss, making it a potential online monitor of ocean salinity and providing a low-cost way to construct an open cavity.

OPTICS LETTERS (2021)

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Article Engineering, Electrical & Electronic

Ultrasensitive Refractive Index Sensor Based on Mach-Zehnder Interferometer and a 40 mu m Fiber

Xueqin Lei et al.

Summary: An ultra-high sensitivity refractive index sensor based on a specially designed 40µm fiber for LP01 and LP11 mode interference in an all-fiber Mach-Zehnder interferometer has been proposed, achieving high sensitivity values in liquid RI and air RH monitoring experiments. This compact sensor showed advantages of high sensitivity, low loss, and flexibility in the tunable monitoring direction of the wavelength shift, making it suitable for various applications requiring high sensitivity RI and RH measurements at precise locations.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2021)

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Article Optics

Magnetic field and temperature two-parameter sensor based on optical microfiber coupler interference (OMCI) wrapped with magnetic fluid and PDMS

Shangpeng Qin et al.

Summary: This paper proposes an optical fiber magnetic field and temperature sensor based on OMC, PDMS, and MF, which has high sensitivity, low cost, and can sense magnetic field and temperature separately. The sensor characteristics were analyzed theoretically and verified experimentally, showing maximum magnetic field sensitivity of 96.8 pm/Oe and maximum temperature sensitivity of 919.1 pm/degrees C. The sensor's cross-sensitivity was overcome by establishing a sensitivity matrix and optimizing the demodulation matrix through size design of the PDMS package and OMC structure.

OPTICS EXPRESS (2021)

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Article Optics

High-precision photonic crystal fiber-based pressure sensor with low-temperature sensitivity

YanJin Zhao et al.

Summary: The novel high-precision photonic crystal fiber-based pressure sensor has low-temperature sensitivity and effectively minimizes the temperature cross-coupling effect. It offers controlled membrane shape and a pressure sensitivity of 2.47 nm/kPa, 5.37 times higher than the temperature sensitivity. The sensor has broad application prospects in chemical and biological detection for real-time pressure monitoring.

OPTICS EXPRESS (2021)

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Article Optics

Compressed-sensing fiber-optic white light interferometry

Qiang Liu et al.

Summary: The proposed dynamic fiber-optic white light interferometry based on the compressed-sensing principle offers a new method for efficient spectrum data acquisition. By compressively sampling the interference spectra of a Fabry-Perot cavity, high acquisition rates can be achieved, as demonstrated by numerical simulations and nanometer-scale vibration experiments.

OPTICS LETTERS (2021)

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Article Engineering, Electrical & Electronic

Cascaded Sagnac Loops Embedded With Two Polarization Maintaining Photonic Crystal Fibers for Highly Sensitive Strain Measurement

Qiang Liu et al.

Summary: An experimental strain sensor based on cascaded Sagnac loops using two PMPCFs has been demonstrated, showing higher sensitivity compared to conventional optical fiber. The Vernier effect is utilized to achieve high resolution, with an average sensitivity of 45.15 pm/mu epsilon and resolution of 0.44 mu epsilon. Comparisons with PMF characteristics were made, concluding the sensor's high sensitivity and great reversibility.

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT (2021)

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Article Optics