[7a-A504-1~12] 【CS.6】3.13 半導体光デバイス,3.15シリコンフォトニクスのコードシェアセッション

▼ [7a-A504-2] Thermo-optic Tuning of Hybrid III-V/Si DFB laser by Direct Heating of Si waveguide for FMCW LiDAR Light Sources

〇(M1)Moataz Eissa¹、Junichi Suzuki¹、Nobuhiko Nishiyama^1,2、Toshihiko Baba³、Shigehisa Arai^1,2 (1.Tokyo Tech、2.IIR、3.Yokohama Natl. Univ.)

キーワード：Silicon Photonics, Hybrid Integration, Thermo-optic tuning

Recently, LiDAR (Light Detection and Ranging) is extending its role in various applications such as autonomous cars and drones. Current LiDAR products use mechanical scanning systems, however, non-mechanical scanning systems with very compact sizes are expected to be realized. In our project, we are developing a one-chip Si photonics FMCW (Frequency Modulated Continuous Wave) LiDAR system with slow-light grating couplers and hybrid lasers. In this system, a tunable DFB laser with <1 nm tuning range (unlike full C-band telecom lasers), ~100 kHz scanning speed, while maintaining high power (>100 mW) and narrow linewidth (~few hundred kHz), is required. In this work, thermo-optic tuning of hybrid III-V/Si DFB laser by direct heating of the Si waveguide underneath the III-V structure is proposed for the first time, via lateral current injection to the Si waveguide through a thin slab layer.