25 April 1997 Planar phased-array wavelength multiplexers based on multimode interference couplers
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We report the demonstration of planar phased-array wavelength division multiplexers which incorporate two self- imaging multimode interference (MMI) couplers interconnected by an array of monomode waveguides. The MMI couplers operate as power splitters/combiners, and the waveguide array is the dispersive element. The excellent characteristics of MMI couplers offer the possibility of designing small-size devices with low loss and with high uniformity among different channels. Two variations of a 5-channel device with 2-nm channel spacing at 1550 nm have been designed and fabricated in a SiO2-SiON rib waveguide system. Both simulated and experimental performance of these multiplexers are presented. It is shown that the first device can function as a 5 X 5 wavelength selective interconnecting component. Also, it is demonstrated, through using a 1 X 5 MMI nonuniform power splitter in the second device, that sidelobes in the multiplexer spectral response can be suppressed by appropriately weighting the power samples in the array waveguides.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Reza Paiam, M. Reza Paiam, R. Ian MacDonald, R. Ian MacDonald, } "Planar phased-array wavelength multiplexers based on multimode interference couplers", Proc. SPIE 3007, Silicon-Based Monolithic and Hybrid Optoelectronic Devices, (25 April 1997); doi: 10.1117/12.273842; https://doi.org/10.1117/12.273842

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