High-Power Low-Divergence 852 nm single transverse mode diode laser with coupled waveguide

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-09-28 DOI:10.1016/j.optlastec.2025.114005

Yongle Zhan , Qiong Qi , Cong Xiong , Shuang Hao , Lingni Zhu , Suo Feng , Suping Liu , Xiaoyu Ma

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Abstract

By introducing the structure of a coupled large optical cavity (CLOC) and optimizing the position and thickness of the coupled waveguide layer, a high-power single mode semiconductor laser operating at 852 nm with a ridge width of 5 μm was fabricated. Compared to lasers with a conventional optical cavity (OC) structure, the vertical divergence angle of the CLOC structure was reduced from 37.5° to 19.2°. Meanwhile, due to its low internal loss of 0.32 cm^-1 and high modal gain coefficient of 14.3 cm⁻¹, the slope efficiency of the CLOC structure device under room-temperature continuous-wave operation reached 1.15 W/A. The most significant advantage of the CLOC structure lies in the combination of the widened N-side waveguide layer and the inserted coupled waveguide layer, which enables a maximum fundamental mode output power of 760.8 mW—a remarkable improvement compared to the 395.1 mW maximum fundamental mode output power of the OC structure.

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高功率低发散852 nm单横模耦合波导二极管激光器

通过引入耦合大光腔（CLOC）结构，优化耦合波导层的位置和厚度，制备出工作波长为852 nm、脊宽为5 μm的高功率单模半导体激光器。与传统光学腔（OC）结构的激光器相比，CLOC结构的垂直发散角从37.5°减小到19.2°。同时，由于CLOC结构器件具有0.32 cm-1的低内部损耗和14.3 cm-1的高模态增益系数，在室温连续波工作下，其斜率效率达到1.15 W/A。CLOC结构最显著的优势在于将加宽的n侧波导层和插入的耦合波导层结合在一起，使最大基模输出功率达到760.8 mW，与OC结构的最大基模输出功率395.1 mW相比，有了显著的提高。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems