[1] Jiang Weiwei, Zhao Ruifeng, Fan Linyong, et al.. Comb-fliter based on twin-core fiber coupler [J]. Chinese J Lasers, 2011, 38(5): 0501001.
[4] You Yang, Zhao Ming, Yang Zhenyu. Progress of study on waveguide and fiber coupling design [J].Laser & Optoelectronics Progress, 2013, 50(2): 020007.
[6] Zhang Ruifeng, Ge Chunfeng, Wang Shuhui, et al.. Fused biconical taper all-wave coupler [J]. Acta Physica Sinica, 2003, 52(2): 390-394.
[7] Wu Chongqing. Optical Waveguide Theory [M]. Beijing: Tsinghua University Press, 2000.
[8] A W Snyder, J Love. Optical Waveguide Theory [M]. Britain: Springer, 1983.
[9] A Li, X Chen, A Al Amin, et al.. Fused fiber mode couplers for few-mode transmission [J]. IEEE Photon Technol Lett, 2012, 24(21): 1953-1956.
[10] S L Chuang. A coupled-mode theory for multiwaveguide systems satisfying the reciprocity theorem and power conservation [J]. J Lightwave Technol, 1987, 5(1): 174-183.
[11] S L Chuang. A coupled mode formulation by reciprocity and a variational principle [J]. J Lightwave Technol, 1987, 5(1): 5-15.
[12] A Hardy, W Streifer. Coupled mode solutions of multiwaveguide systems [J]. IEEE J Quantum Electron, 1986, 22(4): 528-534.
[13] H S Huang, H C Chang. Analytical expression for the coupling between two optical fiber cores with α-power refractive index distribution [J]. J Lightwave Technol, 1989, 7(4): 694-702.