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6 November 2018 High-power high-efficiency tilted waved laser based on the quasi-periodicity photonic crystal structure
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Abstract
A tilted wave (TW) laser based on the quasi-periodicity photonic crystal (QPC) structure is studied to improve the maximum power and wall-plug efficiency of laser diodes. In this work, we first use the longitudinal QPC structure instead of the thick passive waveguide compared with previously reported. In order to localize the first order mode, we designed and optimized the longitudinal QPC structure. The optical confinement factor (OCF) of the fundamental mode is only onesixth of the first order mode. In the experiment, a continuous wave power of 12.8 W at 980 nm is achieved with a peak power conversion efficiency of 57.2%. The laser emitted two nearly symmetric narrow vertical beams in far field pattern, which has a full width at half maximum (FWHM) of 7.6° each.
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Zhonghao Chen, Aiyi Qi, Shaoyu Zhao, Hongwei Qu, Xuyan Zhou, Xiaoxu Xing, Xueyou Wang, and Wanhua Zheng "High-power high-efficiency tilted waved laser based on the quasi-periodicity photonic crystal structure", Proc. SPIE 10812, Semiconductor Lasers and Applications VIII, 108121C (6 November 2018); https://doi.org/10.1117/12.2502518
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