BRIEF RESEARCH REPORT article
Front. Phys.
Sec. Optics and Photonics
Volume 13 - 2025 | doi: 10.3389/fphy.2025.1586316
This article is part of the Research TopicAdvances in High-Power Lasers for Interdisciplinary Applications, Volume IIView all 8 articles
Mode-hop-free wavelength-tunable semiconductor lasers covering the S+C+L band via external-cavity optical feedback
Provisionally accepted
- Ceyear Technologies Co., Ltd, Qingdao, China
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A wide mode-hop-free and narrow-linewidth tunable laser diode source employing a Littman-Metcalf configuration with a diffraction grating is developed. We conducted a series of experiments to evaluate the tuning characteristics and spectral linewidth of the proposed external-cavity diode laser. A continuous, mode-hop-free wavelength tuning range of approximately 180 nm within the S+C+L band is achieved, with a spectral linewidth below 32.95 kHz. Moreover, the device maintains an optical signal-to-noise ratio exceeding 62.60 dB and an output power above 10.11 dBm over the entire tuning range under long-term free-running conditions. This tunable laser, offering both modehop-free operation and narrow-linewidth output, holds significant promise for practical applications such as coherent detection.
Keywords: Wavelength-tunable laser, semiconductor laser, mode-hopping free, external-cavity feedback, narrow linewidth
Received: 02 Mar 2025; Accepted: 15 Apr 2025.
Copyright: © 2025 Sheng, Liu, Wang, Liu, Yin, Zhang, Zhou and Huang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Liwen Sheng, Ceyear Technologies Co., Ltd, Qingdao, China
Zhiming Liu, Ceyear Technologies Co., Ltd, Qingdao, China
Lin Huang, Ceyear Technologies Co., Ltd, Qingdao, China
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