Fibre-optical couple temperature sensor of asymptotic wave with high sensitivity and production of pyrometric cone type sensing fibre-optical coupler
A technology of temperature sensor and fiber optic coupler, applied in thermometers, thermometers with physical/chemical changes, instruments, etc., can solve the problems of anti-interference ability, unsatisfactory sensitivity, complex structure, etc., and achieve strong anti-interference ability and simple structure , the effect of high sensitivity
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[0015] A preferred embodiment of the present invention is described as follows in conjunction with accompanying drawing:
[0016] see figure 1 and figure 2 , the high-sensitivity fiber-coupled evanescent wave temperature sensor includes an optical fiber 1, detectors 3, 4 and a signal processing unit 5, adopts a fiber optic coupler 2 for fused cone sensing as a probe, detectors 3, 4 and a signal processing unit 5. It is characterized in that a fused-cone optical fiber coupler 2 is used as a probe, and the inlet and outlet ends of a coupling fiber 20 of the fused-cone optical fiber coupler 2 for fused-cone sensing are respectively connected to the light source 1 and a Detector 3, and the entrance end of another coupling optical fiber 25 fusion cone section is cut off and is not connected to the light source, and the exit end is connected to another detector 4 through optical fiber; The output ports of the two detectors 3, 4 are connected to the signal The two inlet ports of t...
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