[1] Sato T, Takahashi G, Inul Y. Method and apparatus for optically measuring a current. European Patent Application, Appl. No: 831022.10.B, Publication No: 0 088 419 A1, 1983

[2] Ning Y N, Chu B C B,Jackson D A. Miniature Faraday current sensor based on multiple critical angle reflections in a bulk-optic ring.Opt Lett, 1991,16 (24): 1996～1998

[3] Rochford K B, Rose A H, Deeter M N,et al.Faraday effect current sensor with improved sensitivity-bandwidth product. Opt Lett, 1994,19(22): 1903～1905

[4] Wang Z P, Huang Z J, Kang C,et al.Optical current sensing element with single medium layers for high voltage applications. Optics & Laser Technology, 1999,31: 455～458

[6] Ulrich R, Rashleigh S C, Eickhoff W. Bending-induced birefringence in single-mode fibers. Optics Letters, 1980,5 (6): 273～275