High power GaSb-based distributed feedback laser with laterally coupled dielectric gratings at 1.95 µm

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-11-11 DOI:10.1063/5.0233108

Zhengqing Ding, Juntian Cao, Kun Zhan, Yihang Chen, Lidan Zhou, Weiyuan Wang, Hao Tan, Chengao Yang, Ying Yu, Zhichuan Niu, Siyuan Yu

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引用次数: 0

Abstract

Traditional distributed feedback (DFB) or distributed Bragg reflector (DBR) lasers typically have commonly employed buried gratings as frequency-selective optical feedback mechanisms. However, the fabrication of such gratings often requires regrowth processes, which introduce significant technical challenges, particularly for material systems such as GaAs and GaSb. While metal gratings have been implemented in GaSb-based lasers, they incur additional absorption losses, thereby constraining the device's efficiency and achievable output power. Herein, we introduce a laterally coupled dielectric Bragg grating structure, which enables highly controllable, deterministic, and stable coupling between the grating and the optical mode. Our device demonstrates a continuous-wave output power of 47.02 mW at room temperature, exhibiting stable single-mode operation from 300 to 1000 mA and a maximum side mode suppression ratio of 46.7 dB. These results underscore the innovative lateral coupled dielectric grating as a feasible and technologically superior approach for fabricating DFB and DBR lasers, which hold universal applicability across different material platforms and wavelength bands.

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基于砷化镓的高功率分布式反馈激光器，1.95 微米波长横向耦合介质光栅

传统的分布式反馈（DFB）或分布式布拉格反射器（DBR）激光器通常采用埋入式光栅作为频率选择性光反馈机制。然而，此类光栅的制造通常需要再生长过程，这带来了巨大的技术挑战，尤其是对砷化镓和硒化镓等材料系统而言。虽然在基于砷化镓的激光器中采用了金属光栅，但它们会产生额外的吸收损耗，从而限制了设备的效率和可实现的输出功率。在这里，我们引入了一种横向耦合的介质布拉格光栅结构，它实现了光栅与光学模式之间高度可控、确定和稳定的耦合。我们的器件在室温下的连续波输出功率为 47.02 mW，在 300 到 1000 mA 的范围内实现了稳定的单模运行，最大边模抑制比为 46.7 dB。这些结果表明，创新的横向耦合介质光栅是制造 DFB 和 DBR 激光器的一种可行且技术上更优越的方法，可普遍应用于不同的材料平台和波长带。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.