Double-direction four-channel coupled distribution-type optical-fiber Raman temperature measuring system
A distributed optical fiber and Raman temperature measurement technology, which is used in thermometers, thermometers, measuring devices and other directions with physical/chemical changes, can solve the problems of inability to quickly and accurately locate temperature and position, low measurement accuracy, and local temperature rise. , to achieve the effect of strong anti-electromagnetic interference ability, long transmission distance and fast response speed
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[0017] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so as to better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.
[0018] Such as figure 1 As shown, the bidirectional four-channel coupled distributed optical fiber Raman temperature measurement system of the present invention includes: a broadband light source 1, a bidirectional four-channel fiber coupler 2, a single-mode optical fiber 3, a first optical splitter 4, and a second optical splitter 5. The first photodetection circuit 6, the second photodetection circuit 7, the third photodetection circuit 8, the signal acquisition card 9 and the computer 10; wherein, the A port and the C port of the first optical fiber coupler 2 are respectively connected to the broad...
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