Abstract

In this paper, a compact and broadband mode converter and demultiplexer based on multimode interference (MMI) is designed and experimentally demonstrated on silicon-on-insulator. We have designed a mode converter using cascaded MMI to convert the fundamental mode into a higher-order (first-order mode) and vice versa. Subsequently, we have demonstrated an on-chip two-mode demultiplexer with a compact footprint and low loss. The proposed mode demultiplexer shows low insertion loss (0.22 dB for ${{\rm TE}_0}$ and 0.36 dB for ${{\rm TE}_1}$ mode) and crosstalk (${-}{25.2}\;{\rm dB}$ for ${{\rm TE}_0}$ and ${-}{24.4}\;{\rm dB}$ for ${{\rm TE}_1}$ mode) at wavelength 1550 nm using the eigenmode expansion method. Moreover, the device supports a broad bandwidth having crosstalk ${ \lt } {-} {20}\;{\rm dB}$ over a wavelength range of 1520–1580 nm. The proposed device can be used in mode division multiplexing for photonic network-on-chip.

© 2020 Optical Society of America

Low-loss and compact, dual-mode, 3-dB power splitter combining a directional coupler, a multimode interferometer, and a Y-junction

Jing Long, Haitao Jia, Jialiang Zhang, and Changshui Chen
Appl. Opt. 63(8) 2030-2035 (2024)

Ultra-compact SOI-based higher-order mode pass wavelength demultiplexer

Jinhua Chen, Weiwei Pan, and Chen Ji
Appl. Opt. 63(9) 2376-2381 (2024)

SOI-based compact mode- and polarization-division multiplexer for on-chip optical interconnects: design and simulation

Jyoti Prasad Nath, Nikhil Dhingra, Geetika J. Saxena, and Enakshi K. Sharma
Appl. Opt. 61(14) 4195-4203 (2022)

Compact and broadband mode demultiplexer using a subwavelength grating engineered MMI coupler

Liang Zhang and Jinbiao Xiao
J. Opt. Soc. Am. B 38(10) 2830-2836 (2021)

Etched circular waveguide-based on-chip silicon mode-order converters

Yi Qi, Yin Xu, Bo Zhang, Yue Dong, and Yi Ni
Appl. Opt. 60(22) 6422-6428 (2021)