Inverse design of a multifunctional MMI waveguide for simultaneous wavelength demultiplexing and power splitting

Aolong Sun; Xi Xiao; Nan Chi; Junwen Zhang

doi:10.1117/12.2642596

23 January 2023 Inverse design of a multifunctional MMI waveguide for simultaneous wavelength demultiplexing and power splitting

Aolong Sun, Xi Xiao, Nan Chi, Junwen Zhang

Author Affiliations +

Proceedings Volume 12556, AOPC 2022: Optoelectronics and Nanophotonics; 1255605 (2023) https://doi.org/10.1117/12.2642596
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

We designed and demonstrated a silicon-on-insulator (SOI)-based multifunctional 1×4 multimode interference (MMI)waveguide that can be employed as a 1310/1550 nm wavelength demultiplexer and a 3-dB power splitter at the sametime. The direct binary search (DBS) algorithm is applied to inversely design and optimize the multifunctional MMI. Simulation results show that the insertion loss of our device is 0.67 and 0.50 dB for the 1310 and 1550-nmchannels, while the wavelength isolation values are up to 24 and 37 dB, respectively. The 3-dB bandwidth of our device is largerthan 350 nm, covering the whole O-band, C-band and L-band. Our MMI waveguide has an ultra-compact footprint of 5×2.5 μm², which is more than one order of magnitude smaller than the conventional MMI-based demultiplexers orpower splitters.

Citation Download Citation

Aolong Sun, Xi Xiao, Nan Chi, and Junwen Zhang "Inverse design of a multifunctional MMI waveguide for simultaneous wavelength demultiplexing and power splitting", Proc. SPIE 12556, AOPC 2022: Optoelectronics and Nanophotonics, 1255605 (23 January 2023); https://doi.org/10.1117/12.2642596

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