Fiber laser static strain beat frequency demodulation system based on SSB frequency sweep modulation
A fiber laser and static strain technology, applied in the direction of optical devices, measuring devices, instruments, etc., can solve the problems of the influence of light source wavelength or frequency drift on the demodulation accuracy, and the inability to achieve high-precision static strain measurement and demodulation accuracy, etc., to achieve Effects of improving linearity, high static strain demodulation, and improving demodulation accuracy
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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0025] Such as figure 1As shown, the fiber laser static strain demodulation system includes: 980nm pump source 1, 980nm coupler 2, first wavelength division multiplexer 31, second wavelength division multiplexer 32, first polarization controller 41, second Two polarization controllers 42, a fiber laser for sensing 5, a fiber laser for reference 6, a first isolator 71, a second isolator 72, a first beam combiner 81, a second beam combiner 82, a first broadband photoelectric Detector 91, second broadband photodetector 92, control / processor 17, narrow linewidth laser light source 15, third isolator 73, third polarization controller 43, third beam combiner 83, suppressed carrier unilateral Band modulator 10, the fourth beam ...
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