Nonlinear dispersion element-based photoelectric oscillator stress sensing system

A photoelectric oscillator and stress sensing technology, which is applied in the field of all-optical information processing and optical fiber sensing, can solve the problems of difficult high-speed scanning and resolution limitation, and achieve the effects of improving accuracy, improving sensitivity and reducing costs
CN108400516AInactive Publication Date: 2018-08-14BEIJING JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING JIAOTONG UNIV
Publication Date
2018-08-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a nonlinear dispersion element-based photoelectric oscillator stress sensing system, which comprises an optical frequency comb, a polarization controller, an electrooptical modulator, a circulator, a nonlinear dispersion element, an erbium-doped optical fiber amplifier, a photoelectric detector, a DC blocking device, a low-noise microwave amplifier, a microwave power splitter and a digital processing unit. The nonlinear dispersion element is adopted as a sensing unit and a dispersion value is tuned by stress, so that the generated microwave signal frequency is encoded,and the sensing sensitivity and resolution and the demodulation speed can be effectively improved.
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Description

technical field

[0001] The invention relates to a photoelectric oscillator stress sensing system based on a nonlinear dispersion element, which is suitable for the fields of optical fiber sensing and all-optical information processing. technical background

[0002] Optical fiber sensors, due to their advantages of anti-electromagnetic interference, small size, light weight, and high sensitivity, have received extensive attention in aerospace, building health monitoring, perimeter security, and smart corridors. Among them, the fiber grating sensor is an important fiber optic sensor. By encoding and demodulating the wavelength, it can realize high stability and high reliability sensing of the parameter to be measured, but the resolution of demodulation is often limited by the resolution of optical demodulation instruments such as spectrometers. limitations, and it is not easy to achieve high-speed scanning. However, microwave photonic filters or photoelectric oscillators are ...

Claims

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