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

Deng, Ming; Zhang, Tianheng; Nan, Xinhao; Tang, Yangxu; Feng, Danqi; Guo, Nan; Deng, Shudan; Zhu, Tao

doi:10.1364/ol.445425

Cited by 22 publications

(3 citation statements)

References 16 publications

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“…Among them, optical fiber vibration sensors based on MZI and MI, with double interference arms, can perform local or large range detection [10], [11] . Compared with MZI, MI is simpler and smaller [12] . With the same fiber length, the sensitivity can be twice that of MZI.…”

Section: Introductionmentioning

confidence: 99%

Research on the application of sagnac interference combined with multimode interference in vibration measurement

Tian,

Li,

Yang

et al. 2023

3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023)

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In order to further improve the frequency discrimination ability of fiber optic vibration sensor, this paper uses the multimode fiber (MMF) coupler to construct the Sagnac interferometer, which combines the multimode interference with Sagnac interferometer. Multimode fiber couplers with splitting ratio of 1:1 were fabricated by using MMFs with core diameters of 105 and 62.5 μm respectively, and the Sagnac loops were constructed with the couplers. For comparison and analysis, single-mode-multimode-single-mode interference structures and Mach-Zehnder interferometer were also fabricated by MMFs respectively. Furthermore, single mode fiber based Sagnac loop was also fabricated. Through a large number of experiments, these structures were used to measure vibration frequency, and their performance were compared in detail in the frequency range and the frequency accuracy of vibration detection. The results showed that the intensity difference between the primary peak and the secondary peak of the frequency spectrum obtained by the Sagnac interferometer with the core diameter of 105 μm step-index MMF is greater than 20 dB in the range of 0.3 to 20 kHz with frequency deviation in the order of Hz. With the large detectable frequency range and frequency recognition capability and higher sensitivity to the low frequency vibration, the Sagnac interferometer combined with multi-mode interference provided by the 105 μm step-index MMF is a kind of structure with the best performance among these studied structures in vibration measurement, which provides a new scheme for the research of vibration detection.

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Section: Introductionmentioning

confidence: 99%

Research on the application of sagnac interference combined with multimode interference in vibration measurement

Tian,

Li,

Yang

et al. 2023

3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023)

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“…4 Based on radio-frequency, a sensitivity enhanced optical fiber vibration sensor has been proposed via Michelson interferometer. 5 By virtue of nested pulsed method, Sagnac vibration sensing system has the possibility to locate the actual vibration with limited frequency band. 6 Backscattering-based optical fiber vibration sensor is used for monitoring the perturbation events by measuring the variation of scattered light intensity in the fiber.…”

Section: Introductionmentioning

confidence: 99%

Sagnac interference-based sensitivity tunable optical fiber vibration sensing system

Zheng,

Yu,

Wang

et al. 2023

AOPC 2023: Optic Fiber Gyro

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A vibration optic fiber sensing system with tunable sensitivity based on Sagnac interference is proposed and demonstrated. In virtue of the linear Sagnac interference structure, vibration sensitivity adjustment could be realized by changing the delay fiber length. The phase modulation depth on sensing fiber induced by intrusion disturbance is heavily influenced by the delay fiber length, which reflected in the intensity detected by the AC photo-detector, thus enabling the vibration sensitivity adjustment in optical sensing system. The relationship between the amplitude of intrusion disturbance and delay fiber length shows a sinusoidal function in absolute value.

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“…Microwave photonics (MWP), an emerging interdisciplinary subject, has undergone tremendous growth and advancements over the past two decades [ 14 , 15 , 16 ], and has found successful applications in signal generation [ 17 ], signal processing [ 18 ], as well as sensing [ 19 , 20 ]. Of particular relevance here, various fiber optic sensors based on different MWP interrogation methods were developed recently, such as MWP-filtering techniques [ 21 , 22 , 23 ], optical-carrier-based microwave interferometry [ 16 , 24 ], optoelectronic oscillators [ 25 , 26 ], phase-shift amplified interferometry [ 27 , 28 ], etc. In this paper, we propose and demonstrate MWP fiber ring resonators.…”

Section: Introductionmentioning

confidence: 99%

Microwave Photonic Fiber Ring Resonator

Zhu

Zhuang

2022

Sensors

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In this article, a new concept of microwave photonic (MWP) fiber ring resonator is introduced. In particular, the complex transmission spectra of the resonator in the microwave domain, including magnitude and phase spectra, are measured and characterized. Multiple resonance peaks are obtained in the magnitude spectrum; rapid variations in phase near resonance (i.e., enhanced group delay) are observed in the phase spectrum. We also experimentally demonstrate that the MWP fiber ring resonator can be potentially employed as a novel optical fiber sensor for macro-bending and fiber length change sensing (strain sensing). The experimental results are in good agreement with theoretical predictions.

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

Cited by 22 publications

References 16 publications

Research on the application of sagnac interference combined with multimode interference in vibration measurement

Research on the application of sagnac interference combined with multimode interference in vibration measurement

Sagnac interference-based sensitivity tunable optical fiber vibration sensing system

Microwave Photonic Fiber Ring Resonator

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