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The Experimental Study And Theoretical Analysis Of An Optical Fiber Current Sensor

The influences of the birefringence existed in the single mode fiber upon current sensing is discussed. A theoretical analysis of the sensor head, it can be used to suppress effectively the birefringence in the single mode fiber which is wound on the sensing part of the OFCS, is given. The analysis not only explains the drop of the efficient Verdet constant and nonlinear phinomenon in the OFCS system, but also gives the theoretical basis for designing the OFCS system used in various fields. The set-up, adjusting method and experimental results are also given.