Abstract

We design and experimentally demonstrate a broadband 1310/1550 nm wavelength demultiplexer based on a multimode interference coupler with a tapered internal photonic crystal (PC) structure for the silicon-on-insulator platform. The tapered internal PC structure is engineered to reflect the C-band light while transmitting the O-band light. Novel PC nanotapers are introduced for the internal PC structure that effectively suppress the sidelobe of the photonic bandgap and enable our device to be operable over the O-band. The device was fabricated using electron beam lithography, and its performance has been experimentally characterized. The measured extinction ratios are higher than 15 dB over a 74 nm bandwidth from 1286 to 1360 nm at the O-band, and over a 103 nm bandwidth from 1527 to 1630 nm that covers the C-band and the L-band.

© 2019 Optical Society of America

Polarization-insensitive silicon waveguide crossing based on multimode interference couplers

Jingye Chen and Yaocheng Shi
Opt. Lett. 43(24) 5961-5964 (2018)

Low-loss and broadband polarization-insensitive high-order mode pass filter based on photonic crystal and tapered coupler

Jian Lin, Pengjun Wang, Qiang Fu, Weiwei Chen, Shixun Dai, Dejun Kong, Haoqi Chen, Jun Li, Tingge Dai, and Jianyi Yang
Opt. Lett. 48(12) 3347-3350 (2023)

Low-loss and low-crosstalk silicon triplexer based on cascaded multimode waveguide gratings

Dajian Liu, Ming Zhang, and Daoxin Dai
Opt. Lett. 44(6) 1304-1307 (2019)

Mode-evolution-based silicon-on-insulator 3  dB coupler using fast quasiadiabatic dynamics

Yung-Jr Hung, Zhong-Ying Li, Hung-Ching Chung, Fu-Chieh Liang, Ming-Yang Jung, Tzu-Hsiang Yen, and Shuo-Yen Tseng
Opt. Lett. 44(4) 815-818 (2019)

Integrated lithium niobate polarization beam splitter based on a photonic-crystal-assisted multimode interference coupler

Mingrui Yuan, Xu Han, Huifu Xiao, Thach Giang Nguyen, Andreas Boes, Guanghui Ren, Qinfen Hao, Jiuzhi Xue, Arnan Mitchell, and Yonghui Tian
Opt. Lett. 48(1) 171-174 (2023)