Low Intensity Noise Ring-Cavity Single-Frequency Fiber Laser Using Filter Characterizing Technique

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-04-15 DOI:10.1109/LPT.2025.3560660

Ziqi Zheng;Zhaoan Li;Fengjie Wang;Xiaohui Ma;Wentan Fang;Xiaolin Chen;Wei Zhang;Song Huang;Yong Zhou;Weiqing Gao

引用次数: 0

Abstract

We demonstrate a single-frequency fiber laser (SFFL) with sub-kHz linewidth and ultra-low intensity noise, which is realized by a ring configuration. A newly generalized method to characterize ultra-narrow bandwidth filters and thus avoid mode hopping is proposed, which involves the Kramers-Kronig relation and I-Q demodulation. The resulting SFEL exhibits a narrow linewidth of 0.6 kHz at the wavelength of 1545.35 nm. Also, the mode-hopping-free operation is verified by a scanning F-P interferometer and self-heterodyne method, respectively. The time trace and power monitor present the power variations of 0.02 dB @ 400 ms and 0.05 dB @ 1 h, respectively. The relative intensity noise base caused by shot noise is −147dBc/Hz (>100kHz). The relaxation oscillation peak reaches −130dBc/Hz, which is 30 dB lower than that of commercial SFFL.

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低强度噪声环腔单频光纤激光器的滤波表征技术

我们演示了一种单频光纤激光器（SFFL），它具有亚khz线宽和超低强度噪声，它是通过环形结构实现的。提出了一种新的通用方法来表征超窄带宽滤波器，从而避免模式跳变，该方法涉及到Kramers-Kronig关系和I-Q解调。所得的SFEL在1545.35 nm波长处具有0.6 kHz的窄线宽。通过扫描式F-P干涉仪和自外差法验证了该系统的无跳模特性。时间跟踪和功率监视器显示的功率变化分别为0.02 dB @ 400 ms和0.05 dB @ 1 h。射击噪声引起的相对强度噪声基为−147dBc/Hz （>100kHz）。松弛振荡峰值达到- 130dBc/Hz，比商用SFFL降低了30dB。

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

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.