Beam quality improvement of mid-infrared laser diode with monolithically integrated sawtooth waveguide structures

IF 3.1 3区物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION

Infrared Physics & Technology Pub Date : 2024-12-24 DOI:10.1016/j.infrared.2024.105694

Jianmei Shi , Chengao Yang , Yihang Chen , Tianfang Wang , Hongguang Yu , Juntian Cao , Zhengqi Geng , Zhiyuan Wang , Haoran Wen , Enquan Zhang , Yu Zhang , Hao Tan , Donghai Wu , Yingqiang Xu , Haiqiao Ni , Zhichuan Niu

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引用次数: 0

Abstract

High-power and high beam-quality semiconductor diode lasers emitting around 2 μm have sparked considerable interest owing to their potential applications across various industrial and medical fields. Here, we demonstrate a sawtooth waveguide (SW) structure to achieve enhanced lateral beam quality and power performance based on GaSb. A valid lateral mode discrimination capability is guaranteed by the integrated SW design and triple confirmed by simulation, near field and far field experimental measurement. The resulting SW laser exhibits an enhanced continuous-wave output power of 1.392 W around 2 μm with an increased power conversion efficiency. Moreover, a more concentrated and narrower beam profile is obtained across its whole measurement range, with lateral beam parameter product notably improved by up to 48 % compared to the conventional broad area laser. These results show significant promise for enhancing the performance of existing systems and enabling new applications.

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来源期刊

Infrared Physics & Technology 物理-光学

CiteScore

5.70

自引率

12.10%

发文量

400

审稿时长

67 days

期刊介绍： The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region. Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine. Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.