Abstract

A compact and broadband nine-channel mode-division (de)multiplexer is proposed and demonstrated. The asymmetrical directional coupler based multimode (de)multiplexers and the densely packed multimode waveguide arrays are combined to enhance the mode capacity. The proposed (de)multiplexer shows theoretical crosstalk that is <−15 dB over an 100-nm wavelength band for all the nine channels. The experimental results show a low crosstalk that is <−15 dB over a 55-nm wavelength range for all the supported modes.

Ultra-broadband 16-channel mode division (de)multiplexer utilizing densely packed bent waveguide arrays

Hongnan Xu and Yaocheng Shi
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Experimental demonstration of simultaneous mode and polarization-division multiplexing based on silicon densely packed waveguide array

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Densely packed waveguide array (DPWA) on a silicon chip for mode division multiplexing

Liu Liu
Opt. Express 23(9) 12135-12143 (2015)

Ultracompact and broadband asymmetric directional-coupler-based mode division (de)multiplexer

Kolsoom Mehrabi and Abbas Zarifkar
J. Opt. Soc. Am. B 36(7) 1907-1913 (2019)

Broadband optical switch for multiple spatial modes based on a silicon densely packed waveguide array

Kaixuan Chen, Jialin Yan, Sailing He, and Liu Liu
Opt. Lett. 44(4) 907-910 (2019)