High-Brightness Low-Divergence Tapered Lasers with a Narrow Taper Angle

High-brightness tapered lasers with photonic crystal structures are designed and fabricated. A narrow taper angle is designed for the tapered section. The device delivers an output power of 3.3 W and a maximum wall-plug efficiency of 43%. The vertical beam divergence is around 11° at different curre...

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Bibliographic Details
Published in:Chinese physics letters 2019-08, Vol.36 (8), p.84201
Main Authors: Chen, Zhong-Hao, Qu, Hong-Wei, Ma, Xiao-Long, Qi, Ai-Yi, Zhou, Xu-Yan, Wang, Yu-Fei, Zheng, Wan-Hua
Format: Article
Language:English
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Summary:High-brightness tapered lasers with photonic crystal structures are designed and fabricated. A narrow taper angle is designed for the tapered section. The device delivers an output power of 3.3 W and a maximum wall-plug efficiency of 43%. The vertical beam divergence is around 11° at different currents. Nearly diffraction-limited beam qualities for the vertical and lateral directions are obtained. The lateral beam quality factor M 2 is below 2.5 and the vertical M 2 value is around 1.5 across the whole operating current range. The maximum brightness is 85 MW·cm −2 sr −1 . When the current is above 3.3 A, the brightness is still above 80 MW·cm −2 sr −1 .
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/36/8/084201