C + L-band tunable sub-kHz linewidth single frequency fiber laser by combining a fiber sub-ring with a saturable absorber

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2024-10-09 DOI:10.1016/j.optlastec.2024.111944

Laiyang Dang , Dongmei Huang , Zhiyao Su , Yujia Li , Feng Li

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引用次数: 0

Abstract

A sub-kHz linewidth single-frequency fiber laser that can be tuned in the full range of C + L band is proposed and experimentally demonstrated. A broad band gain fiber by bidirectional pumping combining with a wide tunable filter is used to realize 75.87 nm tuning range from 1529.98 to 1605.85 nm, which can be further improved if a wider tunable filter is available. To achieve single-frequency ultra-narrow linewidth laser operation, a ring-cavity laser configuration with a fiber sub-ring and a saturable absorber is utilized. The measured optical signal-to-noise ratio (OSNR) of the fiber laser is over 80 dB, the side mode suppression ratio (SMSR) can be improved to ∼60 dB, and the linewidth can be narrowed to ∼453 Hz. The output power of the laser exceeds 28 mW, and the slope efficiency is 2.05 %. This proposed fiber laser has the advantages of narrow linewidth, excellent wavelength tunability, and high output power, which is promising for the applications in optical sensing and optical communication systems.

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通过将光纤子环与可饱和吸收器相结合实现 C + L 波段可调谐亚千赫线宽单频光纤激光器

我们提出了一种可在 C + L 波段全范围内调谐的亚千赫线宽单频光纤激光器，并进行了实验演示。通过双向泵浦的宽带增益光纤与宽可调谐滤波器相结合，实现了从 1529.98 到 1605.85 nm 的 75.87 nm 调谐范围，如果有更宽的可调谐滤波器，调谐范围还能进一步提高。为了实现单频超窄线宽激光器的运行，采用了带有光纤子环和可饱和吸收器的环腔激光器配置。光纤激光器的实测光信噪比（OSNR）超过 80 dB，侧模抑制比（SMSR）可提高到 ∼ 60 dB，线宽可缩小到 ∼ 453 Hz。激光器的输出功率超过 28 mW，斜率效率为 2.05%。这种光纤激光器具有线宽窄、波长可调谐性好、输出功率高等优点，有望在光传感和光通信系统中得到应用。

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

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