[1] Takiguchi K,Kawanishi S,Takara H,et al.Dispersion slope equalizer for dispersion shifted fiber using a lattice-form programmable optical filter on a planar lightwave circuit.J Lightwave Technol,1998,16 (9):1647～1655

[2] Doerr C R,Joyner C H,Stulz L W,et al.Wavelength-division multiplexing cross connect in InP.Photon Technol Lett,1998,10(1):117～119

[3] Sun Z J,McGreer K A,Broughton J N.Demultiplexer with 120 channels and 0.29-nm channel spacing.Photon Technol Lett,1998,10(1) :90～92

[4] Offrein B J,Bona G L,Horst F,et al.Wavelength tunable optical add-after-drop filter with flat passband for WDM networks.Photon Technol Lett,1999,11(2):239～241

[5] Albert J,Bilodeau F,Johnson D C,et al.Low-loss planar lightwave circuit OADM with high isolation and no polarization dependence.Photon Technol Lett,1999,11(3):346～348

[12] Okamoto K.Theory of Optical Waveguides.Tokyo:Corona Publishing Co.,Ltd.,1992.39～ 45