講演情報
[20p-A201-16]Dispersion Turning Point in Liquid Crystal-Clad Asymmetric Rib Waveguide Long Period Grating Structure
〇(D)Rajat Chauhan1, Uma Shamkar Tripathi2, Vipul Rastogi1,3 (1.I.I.T. Roorkee, 2.I.R.D.E. Dehradun, 3.C.P.Q.C.T. Roorkee)
キーワード：
Long period waveguide gratings、rib waveguide、dispersion turning point
We present a novel design to realize the dispersion turning point (DTP) of the long-period grating (LPG) for coupling between TE00 and TE10 modes of an asymmetric rib waveguide. We have simulated the phase-matching curves of LPG for symmetric and asymmetric rib waveguide structures for wavelength range 1.2-1.8 µm. We observe that the DTP doesn’t exist for symmetric rib waveguide structure, but for the asymmetric rib waveguide structure, phase matching curves show the existence of DTP near 1.5 µm wavelength. This study can help model devices near DTP in asymmetric rib waveguide structures.