Abstract

Laser diodearray and photo diode array combined through coarse wavelength division multiplexed (CWDM) are widely used in short-reach optical communication within massive web-scale data center. Those components can be used in solid-state photonics-based Lidar built upon silicon-on-insulator (SOI) waveguide as well, achieving significant cost saving. Beam steering can be naturally achieved through diffraction in output grating couplers. However, current design is hampered by low angular resolution. We demonstrate a novel design by combining outputs of two grating couplers with orthogonal polarizations in an interleaving manner. This scheme effectively doubles the angular resolution of on-chip Lidar.

Bidirectional grating based interleaved angled MMI for high-uniformity wavelength division (de)multiplexing and surface-normal fiber packaging

Zanyun Zhang, Tianjun Liu, Kaixin Zhang, Meixin Li, Hongwei Liu, Hongqiang Li, Pingjuan Niu, and Erdan Gu
Appl. Opt. 60(19) 5615-5622 (2021)

Polarization-insensitive four-channel coarse wavelength-division (de)multiplexer based on Mach–Zehnder interferometers with bent directional couplers and polarization rotators

Hongnan Xu, Liu Liu, and Yaocheng Shi
Opt. Lett. 43(7) 1483-1486 (2018)

Broadband and polarization flexible SOI grating coupler based on sub-wavelength gratings with low back reflections

Neha Purwaha, Ahmad Atieh, and Winnie N. Ye
OSA Continuum 2(4) 1350-1357 (2019)

On-chip multiplexing conversion between wavelength division multiplexing–polarization division multiplexing and wavelength division multiplexing–mode division multiplexing

Mengyuan Ye, Yu Yu, Jinghui Zou, Weili Yang, and Xinliang Zhang
Opt. Lett. 39(4) 758-761 (2014)

Polarization-insensitive 1D unidirectional compact grating coupler for the C-band using a 500 nm SOI

Muhammad Shemyal Nisar and Liangjun Lu
Appl. Opt. 61(25) 7373-7379 (2022)