1. High-Brightness Low-Divergence Tapered Lasers with a Narrow Taper Angle.
- Author
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Zhong-Hao Chen, Hong-Wei Qu, Xiao-Long Ma, Ai-Yi Qi, Xu-Yan Zhou, Yu-Fei Wang, and Wan-Hua Zheng
- Subjects
SOLID-state lasers ,QUALITY factor ,LASERS ,PHOTONIC crystals - Abstract
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 M2 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 . [ABSTRACT FROM AUTHOR]- Published
- 2019
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