Low coherence multiplex optical fiber interferometer based on non-balanced Mach-Zehnder optical autocorrelator
A technology of optical fiber interferometer and autocorrelator, which is applied in the direction of using optical devices, using optical devices to transmit sensing components, instruments, etc., can solve the problems of identification and sensor measurement difficulties, large light source power attenuation, and sensors are no longer unique. Achieve the effects of suppressing optical path matching interference noise, enhancing utilization efficiency, and avoiding instability
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[0055] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0056] A scheme for distributed optical fiber sensing measurement system based on unbalanced Mach-Zehnder structured optical autocorrelator, such as Figure 5 shown. Depend on Figure 5 It can be seen that the distributed optical fiber white light interference sensor array is composed of a wide-spectrum light source 1, an unbalanced Mach-Zehnder optical autocorrelator 2, an optical path autocorrelation detection unit 3, a transmission optical fiber 4, and an optical fiber sensor array 5 connected end to end. Unbalanced Mach-Zehnder optical autocorrelator 2 is made up of the first fiber coupler 21, three-port optical circulator 23, fiber collimator 24, movable optical mirror 25 and the second fiber coupler 26; The detection unit 3 is composed of three-port optical circulators 31 , 33 and optical detectors 32 , 34 .
[0057] Such as Figure 5 shown. When the st...
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