Distributed fiber Raman temperature measuring device and method based on ASE noise
An ASE noise, distributed optical fiber technology, applied in measurement devices, thermometers with physical/chemical changes, thermometers, etc., can solve problems such as system performance degradation, difficulty in signal capture, and difficulty in meeting practical applications.
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[0017] A distributed optical fiber Raman temperature measurement device based on ASE noise, including ASE noise light source, first tunable optical filter, first 1×2 fiber coupler, photodetector, optical circulator, second 1×2 Fiber optic coupler, second tunable optical filter, first avalanche photodetector, first low noise amplifier, third tunable optical filter, second avalanche photodetector, second low noise amplifier, data acquisition card, Computer, sensor fiber.
[0018] The output end of the ASE noise light source 1 is connected to the input end of the first tunable filter 2 through a common single-mode jumper, and the output end of the first tunable optical filter 2 is connected to the first 1× through a common single-mode fiber jumper. 2 The incident end of the optical fiber coupler 3 is connected, one of the output ends of the first 1×2 optical fiber coupler 3 is connected to the input end of the photodetector 4, and the output end of the photodetector 4 is connected t...
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