Abstract

We report a near-diffraction-limited tapered Bragg reflection waveguide laser (BRL) with a 10 μm ridge width, which is significantly larger than the conventional design. The large mode expansion in the vertical waveguide enables a scalable increase in the ridge width for single lateral mode operation. The role of the taper angle in the performance of tapered BRLs with the intrinsic characteristics of a thick vertical waveguide was investigated. The results indicate that the BRL with a taper angle of 3° shows the best far-field performance. An extremely low vertical divergence angle of 14.5° and a lateral divergence as low as 2.8° for 95% power inclusion were realized. A continuous-wave power exceeding 1 W was demonstrated. Over the entire operating current range, the vertical beam is almost unchanged with an excellent beam quality (${\mathrm{M}}^2$) of about 1.3. Lateral beam width increases slightly at higher currents due to the increasing contribution of side lobes, but it still remains nearly diffraction-limited with a lateral ${\mathrm{M}}^2$ of less than 2. Narrow beam divergence and high beam quality of the lasers allow simple and inexpensive collimation and coupling.

© 2018 Optical Society of America

High-power high-brightness 980 nm lasers with >50% wall-plug efficiency based on asymmetric super large optical cavity

Shaoyu Zhao, Aiyi Qi, Mingjin Wang, Hongwei Qu, Yuzhe Lin, Fengxin Dong, and Wanhua Zheng
Opt. Express 26(3) 3518-3526 (2018)

Astigmatism-free high-brightness 1060 nm edge-emitting lasers with narrow circular beam profile

Md. Jarez Miah, Vladimir P. Kalosha, Dieter Bimberg, Johannes Pohl, and Markus Weyers
Opt. Express 24(26) 30514-30522 (2016)

High-power, low-lateral divergence InP type-I lasers around 2 µm with tapered waveguide structures

Dong-Bo Wang, Ning Zhuo, Feng-Min Cheng, Zeng-Hui Gu, Jin-Chuan Zhang, Shen-Qiang Zhai, Li-Jun Wang, Jun-Qi Liu, Shu-Man Liu, Feng-Qi Liu, and Zhan-Guo Wang
OSA Continuum 2(5) 1612-1620 (2019)

783 nm wavelength stabilized DBR tapered diode lasers with a 7 W output power

Bernd Sumpf, Lara Sophie Theurer, Martin Maiwald, André Müller, André Maaßdorf, Jörg Fricke, Peter Ressel, and Günther Tränkle
Appl. Opt. 60(18) 5418-5423 (2021)

996 nm high-power single-longitudinal-mode tapered gain-coupled distributed feedback laser diodes

Yuxin Lei, Yongyi Chen, Feng Gao, Dezheng Ma, Peng Jia, Hao Wu, Chunkao Ruan, Lei Liang, Chao Chen, Jun Zhang, Li Qin, Yongqiang Ning, and Lijun Wang
Appl. Opt. 58(23) 6426-6432 (2019)