Fiber sensor based on Michelson interference

An optical fiber sensor and optical coupler technology, which is applied in the direction of using optical devices to transmit sensing components, can solve the problems of variable frequency, difficult to filter clean, unfavorable optical fiber sensors, etc., and achieves the effect of reliable operation.
CN109029518AInactive Publication Date: 2018-12-18JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JILIN UNIV
Publication Date
2018-12-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a fiber sensor based on Michelson interference and belongs to the technical field of the fiber sensor. A main structure of the fiber sensor comprises a pump source (1), a firstoptical coupler (2), an optical wavelength division multiplexer (3) and the like. According to the fiber sensor, a sinusoidal signal is taken as a modulation signal and high frequency interference isnot generated. The fiber sensor is characterized by relatively reliable working, high sensing precision and wide application range.
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Description

technical field

[0001] The invention belongs to the technical field of optical fiber sensors, in particular to an optical fiber sensor based on Michelson interference. Background technique

[0002] Fiber Bragg grating (FBG) is widely used in the field of sensing technology due to its advantages of anti-electromagnetic interference, chemical resistance, small transmission loss, small size and light weight, and easy mass production. Especially in micro-stress detection, temperature detection in harsh environments, etc., fiber optic sensors have unique advantages. On the one hand, very small changes in temperature or stress can be detected sensitively by fiber Bragg gratings, with high sensitivity. On the one hand, in harsh environments such as humidity and strong electromagnetic interference, the fiber Bragg grating is not easy to damage, the working performance is not affected, and the signal transmission is not disturbed. These advantages make Bragg fiber grating sensors wi...

Claims

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