[1] Jensen S M. The nonlinear coherent coupler. IEEE J. Quant. Electron., 1982, QE-18(10)：1580～1583

[2] Finlayson N, Stegeman G I. Spatial switching, instabilities and chaos in a three-waveguide nonlinear directional coupler. Appl. Phys. Lett., 1990, 56(23): 2276～2278

[3] Liu Gangjun, Liang Binming, Jin Guoliang et al.. Arc-shaped waveguide switch based on the third-order nonlinear effect. Appl. Opt., 2002, 41(24): 5022～5024

[4] Liu Gangjun, Liang Binming, Jin Guoliang et al.. Multiple coupling length nonlinear directional couplers with variable coupling coefficient.Opt. Commun.,2003,218(1): 113～117

[5] Jin Guoliang, Cao Junfeng, Cao Zhuangqi et al.. Optimizing design of all-optical switches. Acta Optica Sinica (光学学报), 1996, 16(9): 1332～1336 (in Chinese)

[6] Liu Jun, Jin Guoliang, Ying Zaisheng et al.. Study of arc-type all-optical waveguide switch based on self-focusing substrate. Acta Optica Sinica (光学学报), 2000, 20(7): 957～961 (in Chinese)

[7] Jin Guoliang, Mizumoto T, Pu Guosheng. All-optical switching in intersecting waveguide. Acta Optica Sinica (光学学报), 1995, 15(11): 1590～1593 (in Chinese)

[8] Wang Youfa, Wang Qi, Bao Jiashan. All-optical digital switch and optical limiter. Acta Optica Sinica (光学学报), 1999, 19(5): 703～708 (in Chinese)