All-fiber current transformer and working method thereof
A current transformer and all-fiber technology, applied in the direction of voltage/current isolation, etc., can solve serious problems, temperature effects, poor temperature stability of the system, etc., and achieve the effects of improving sensitivity, eliminating birefringence, and improving phase sensitivity
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[0036] The present invention provides an all-optical fiber current transformer, and the specific implementation manner of the present invention will be described in detail below with reference to the accompanying drawings.
[0037]An all-fiber current transformer, comprising a light source 1, an optical receiving module 2, an analog-to-digital converter 3, a digital demodulator 4, a microprocessor 5, a modulation driver 6, a Y branch integrated optical phase modulator 7, and a fiber optic coupler 8. Composed of polarization maintaining delay fiber 9, polarization maintaining fiber 17, polarization maintaining fiber coupler 10, λ / 4 delayer 11, sensing fiber 12 and reflector 13. The connection method is: the optical output end of the light source 1 is input to the first input end of the fiber coupler 8, the light receiving module 2 is connected to the second input end of the fiber coupler 8, the light receiving module 2, the digital converter 3, the digital solution The modulato...
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