Abstract

We developed a thermo-optically controlled nonmechanical optical beam scanner using a Si photonic crystal slow-light waveguide with a diffraction grating to achieve on-chip light detection and ranging (LIDAR). This Letter applies pre-emphasis signals to the thermo-optic control, and the cutoff frequency increases to 500 kHz. Observing the beam scanning in the space-time domain showed that the turn-on and turn-off times of the scanner for a rectangular drive voltage were 10 µs and reduced to 2.7 µs when the pre-emphasis signals were optimized. This new, to the best of our knowledge, result enables a frame rate of 29 fps for 12,800 resolution points in LIDAR.

© 2021 Optical Society of America

Step-like beam scanning in a slow-light grating beam scanner for a FMCW LIDAR

Jun Gondo, Takemasa Tamanuki, Ryo Tetsuya, Mikiya Kamata, Hiroyuki Ito, and Toshihiko Baba
Opt. Lett. 47(20) 5341-5343 (2022)

Si photonic crystal slow-light waveguides optimized through informatics technology

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Doppler velocimeter and vibrometer FMCW LiDAR with Si photonic crystal beam scanner

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Opt. Express 29(19) 30727-30734 (2021)

Low-power and high-speed 2 × 2 thermo-optic MMI-MZI switch with suspended phase arms and heater-on-slab structure

Fei Duan, Kai Chen, Da Chen, and Yonglin Yu
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Dispersion engineering and thermo-optic tuning in mid-infrared photonic crystal slow light waveguides on silicon-on-insulator

Yiming Ma, Bowei Dong, Bo Li, Kah-Wee Ang, and Chengkuo Lee
Opt. Lett. 43(22) 5504-5507 (2018)