[1] [1] D Penninckx, N Beck, J Gleyz, et al.. Signal propagation over polarization-maintaining fibers: problem and solutions[J]. J Lightwave Technol, 2006, 24(11): 4197-4207.

[2] [2] T Segi, Y Ouchi, K Nishiwaki, et al.. Polarization-maintaining EDFA for optical sensing application, composed of PANDA fiber based low loss and low cross-talk optical components[C]. Optical Fiber Sensors Conference Technical Digest, 2002, 1: 289-292.

[3] [3] Lin Jinhai, Zhang Weigang. Recent process in theory, design and development of fiber coupler[J]. Progress in Physics, 2010, 30(1): 37-80.

[4] [4] He Na, Wu Chongqing, Wei Yan, et al.. Fused planar 3×3 single mode fiber coupler[J]. Chinese J Lasers, 2004, 31(4): 323-327.

[5] [5] Yang Huayong, Jiang Nuan, Zhang Xueliang, et al.. Study on fabrication and optical add-drop multiplexing experiments with panda fiber grating coupler[J]. Chinese J Lasers, 2010, 37(6): 1430-1433.

[6] [6] Zou Weiwen, He Zuyuan, Kazuo Hotate. Complete discrimination of strain and temperature using Brillouin frequency shift and birefringence in a polarization-maintaining fiber[J]. Opt Express, 2009, 17(3): 1248-1255.

[7] [7] Zheng W. Automated fusion-splicing of polarization maintaining fiber[J]. J Lightwave Technol, 1997, 15(1): 125-134.

[8] [8] W X Zheng, D Duke, K Toshiki, et al.. Interrelation profile analysis method for alignment of polarization-maintaining fiber[C]. Proceedings of Optical Fiber Communication, Collocated National Fiber Optic Engineers, San Diego, CA, 2010.

[9] [9] W X Zheng, H Sugawara, B Malinsky. Fourier analysis method for asymmetric polarization-maintaining fiber alignment[C]. OFC/NFOEC2012, Los Angeles, CA, 2012.

[10] [10] Hu Yongming, Chen Zhe, Liao Yanbiao, et al.. Computer simulation of phase contrast alignment of birefringent axes in panda fiber of matching refractive-index[J]. Chinese J Lasers,1998, 25(8): 715-721.

[11] [11] Wu Yulie, Zheng Yu, Wang Jin′e, et al.. Research of azimuthal alignment for PANDA fiber[J]. Acta Photonica Sinica, 2007, 36(7): 1224-1229.

[12] [12] Chen Shaoying, Di Hongwei, Chen Zhe, et al.. Azimuthal alignment method for PM fiber based on light intensity distributions with five finger profile[J]. Applied Laser, 2006, 26(1): 35-38.

[13] [13] Rong Weibin, Gao Jian, Chen Tao, et al.. Method optimization and determining polarization direction experiment of ultra-fine polarization maintaining fiber[J]. Opto-Electronic Engineering, 2010, 37(8): 36-41.

[14] [14] Zhang Jianwei, Ning Yongqiang, Zhang Xing, et al.. Analysis of the thermal model based on the carrier injection mechanisms within the semiconductor laser[J]. Chinese J Lasers, 2012, 39(10): 1002003.

[15] [15] N Kehtarnavaza, H J Oh. Development and real-time implementation of a rule-based auto-focus algorithm[J]. Real-Time Imaging, 2003, 9(3): 197-203.

[16] [16] W B Rong, W Zhang, L F Wang, et al.. Investigation of the data processing method for high-precision alignment of PM fibers[J]. Key Engineering Materials, 2013, 562-565: 1482-1488.