Use of Reconfigurable IM Regions to Suppress Propagation and Polarization Dependent Losses in a MMI Switch
Keywords:
Selfimages in MMI waveguides, Reconfigurable IM regions, I.L. and E.L., CT levelsAbstract
With this work, use of reconfigurable index modulated (IM) regions to accelerate the performance of a multimode interference (MMI) based photonic switch is presented. Appropriate dimension for such regions are defined to suppress the transition losses and to optimize the area coverage. It has been noticed that by reconfiguring the IM regions, perfect switching for test wavelengths of 1.3μ m and 1.55μ m with low insertion loss (I.L.) levels, ≤ 1.2dB and excess loss (E.L.) levels, ≤ 0.17dB can be achieved with vacillation of extremely low polarization dependent losses (PDLs), which are ≤ 0.15dB. For either case of input test wavelengths, generated crosstalk (CT) levels are found better than -21.8dB for TE and -20.2dB for TM polarization state.
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