Research For Fiber-optic Electric Current Sensors Of Phase Modulating Mode

This text has summed up the current situation of the development of the domestic and international fiber-optic electric current sensor, aim at the question existed of the traditional electric current measure equipment at present that electric power system adopt, studied and designed a kind of fiber-optic electric current sensors of phase modulating mode. Design of Sensing head is based on magnetostrictive effect, the interferometer adopts Mach-Zehnder interferometric structure, guarantees the orthogonal state of the interferometer following through the phase compensator, thus reaches the largest sensitivity. Experimental result indicates the sensor that this article design has the advantages of simple-structure, high- sensitivity, low-price, easy to practical application, there is extensive using value in the power system. XUE Jian (communication and information system) Directed by prof.LI Wentian...