Abstract

A compact hybrid wavelength- (WDM) and mode-division (de)multiplexer (MDM) is proposed, and its performance is evaluated. The design of the device is based on 2D photonic crystals with a square lattice and Si rods. The device can multiplex two eigenmodes, ${\mathrm{TM}}_0$ and ${\mathrm{TM}}_1$, and two wavelengths, 1550 and 1300 nm. Two identical multimode interference couplers and an asymmetric directional coupler are used in implementing both the wavelength- and mode-division multiplexing functions, respectively. To avoid back-reflections, tapers are used at waveguide junctions. The structure is compact with dimensions of $29\mathrm{\mu m}\times 12\mathrm{\mu m}$, which is suitable for on-chip integration. Simulation results reveal that the insertion losses and crosstalks are less than $-1.0927$ and $-11.9024\mathrm{dB}$, respectively, for all four channels.

© 2018 Optical Society of America

Ultra-compact silicon mode (de)multiplexer based on directional couplers with subwavelength sidewall corrugations

Xiaofei Wang, Hui Yu, Qiang Zhang, Zhilei Fu, Penghui Xia, Qikai Huang, Nannan Ning, Zhujun Wei, Yuehai Wang, Xiaoqing Jiang, and Jianyi Yang
Opt. Lett. 47(9) 2198-2201 (2022)

Compact hybrid five-mode multiplexer based on asymmetric directional couplers with constant bus waveguide width

Simei Mao, Lirong Cheng, Caiyue Zhao, Yinghui Wang, Qian Li, and H. Y. Fu
Opt. Lett. 48(10) 2607-2610 (2023)

Silicon-based hybrid demultiplexer for wavelength- and mode-division multiplexing

Ying Tan, Hao Wu, Shipeng Wang, Chenlei Li, and Daoxin Dai
Opt. Lett. 43(9) 1962-1965 (2018)

Broadband and fabrication-tolerant on-chip scalable mode-division multiplexing based on mode-evolution counter-tapered couplers

Jing Wang, Yi Xuan, Minghao Qi, Haiyang Huang, You Li, Ming Li, Xin Chen, Zhen Sheng, Aimin Wu, Wei Li, Xi Wang, Shichang Zou, and Fuwan Gan
Opt. Lett. 40(9) 1956-1959 (2015)

Compact silicon-photonic mode-division (de)multiplexer using waveguide-wrapped microdisk resonators

Dusan Gostimirovic and Winnie N. Ye
Opt. Lett. 46(2) 388-391 (2021)