Sidelobe suppression of laser diode arrays by on-chip phase and amplitude manipulation

Xuyan Zhou; Hongwei Qu; Aiyi Qi; Zhonghao Chen; Xiaoxu Xing; Xueyou Wang; Yufei Wang; Wanhua Zheng

doi:10.1117/12.2500531

5 November 2018 Sidelobe suppression of laser diode arrays by on-chip phase and amplitude manipulation

Xuyan Zhou, Hongwei Qu, Aiyi Qi, Zhonghao Chen, Xiaoxu Xing, Xueyou Wang, Yufei Wang, Wanhua Zheng

Proceedings Volume 10811, High-Power Lasers and Applications IX; 108110J (2018) https://doi.org/10.1117/12.2500531
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

The semiconductor laser diode has the advantage of low cost, high efficiency, and compactness, but the beam divergence is too large to directly use. The phase-locked laser array is an efficient way to control the lateral lasing mode, which can help to achieve narrow farfield.. Though the lasing mode of phase-locked laser array can be an in-phase mode via Ywaveguide, integrated with phase shifter and external cavity, it still has a large side lobe in the farfiled. We demonstrated an on-chip phase and amplitude manipulation method to suppress the side-lobe in the farfield. The intensity of the sidelobes decrease from 0.307 to 0.109 and the integral energy of the main lobe increase from 52.5% to 60.5%

Citation Download Citation

Xuyan Zhou, Hongwei Qu, Aiyi Qi, Zhonghao Chen, Xiaoxu Xing, Xueyou Wang, Yufei Wang, and Wanhua Zheng "Sidelobe suppression of laser diode arrays by on-chip phase and amplitude manipulation", Proc. SPIE 10811, High-Power Lasers and Applications IX, 108110J (5 November 2018); https://doi.org/10.1117/12.2500531

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