[1] SMIT M K,DAM V C.PHASAR-based
[2] WDM-devices:principles,design and applications[J].IEEE J Sel TOP Quant
[3] Electron,1996,2(2):236-250.
[4] LUCAS B S,ERIC C M.Optical multi-mode interference devices based on self-imaging
[5] principles and applications[J].IEEE J Light Technol,1995,13(4):615-623.
[6] LUCAS B S,FRANK B,SMIT M K,et al.Planar monomode optical couplers based on multimode
[7] interference effects[J].IEEE J Light Technol,1992,10(12):1883-1890.
[8] MULE' A V,VILLALAZ R,GAYLORD T K,et al.Photopolymerbased diffractive and MMI waveguide
[9] couplers[J].IEEE Photon Technol Lett,2004,16(10):2490-2492.
[10] MARTIN T H,LEIJTENS X J M,KHOE G D,et al.Optimizing imbalance and loss in 2×2 3-dB
[11] multimode interference couplers via access waveguide width[J].IEEE J Light
[12] Technol,2003,21(10):2305-2313.
[13] WANG Qian,HE Sai-ling,HUANG Nai-rong,et al.Optimal design of weak-waveguide multimode
[15] MA H L.Self-imaging characteristics of MMI coupler with two-dimensional
[16] confinement[J].Acta Photonica Sinica,2003,32(6):658-661.
[17] BACHMANN M,MELCHIER H.General self-imaging properties in N×N multimode interference
[18] couplers including phase relations[J].Appl Opt,1994,33(18):3905-3911.
[19] MA H L,LI J,YANG J Y,et al.Analysis of deep-etched,single-mode GaAs/GaAlAs optical rib
[20] waveguides using discrete spectral index method[J].Acta Photonica
[21] Sinica,2000,29(2):151-156.
[22] YOO H M,LEE M H,JU J J,et al.Polymeric 16×16 arrayedwaveguide grating router using
[23] fluorinated polyethers operating around 1 550 nm[J].IEEE J Sel TOP Quant
[24] Electron,2001,7(5):806-811.
[25] HUANG J Z,SCARMOZZINO R,OSGOOD R M.A new design approach to large input-output number
[26] multimode interference couplers and its application to low-crosstalk WDM routers[J].IEEE
[27] Photon Technol Lett,1998,10 (9):1292-1294.
[28] BESSE P A,GINI E,BACHMANN M,et al.New 2×2 and 1×3 multimode interference couplers
[29] with free selection of power splitting ratios[J].IEEE J Light
[30] Technol,1996,14(10):2286-2293.
