千赫兹及以下激光线宽短光纤延时自外差测量中 1/f 噪声影响的抑制

doi:10.3969/j.issn.1007-5461.2026.04.011

量子电子学报 ›› 2026, Vol. 43 ›› Issue (4): 623-631.doi: 10.3969/j.issn.1007-5461.2026.04.011

千赫兹及以下激光线宽短光纤延时自外差测量中 1/f 噪声影响的抑制

钱诚 1,2, 刘孝兵 2,3, 杨秀梅 2,4, 李重阳 2,4, 黄瑞冬 2,4, 薛驷明 2,3, 毛庆和 2,3,4*

1 安徽大学物质科学与信息技术研究院, 安徽合肥 230601; 2 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 光子器件与材料安徽省重点实验室, 安徽合肥 230031; 3 先进激光技术安徽省实验室, 安徽合肥 230037; 4 中国科学技术大学环境科学与光电技术学院, 安徽合肥 230026

收稿日期:2024-03-15 修回日期:2024-05-07 出版日期:2026-07-28 发布日期:2026-07-27
通讯作者: E-mail: mqinghe@aiofm.ac.cn E-mail:E-mail: mqinghe@aiofm.ac.cn
作者简介:钱诚 ( 1996 - ), 安徽合肥人, 研究生, 主要从事单频光纤激光方面的研究。E-mail: qc2018@mail.ustc.edu.cn
基金资助:
科技创新2030"量子通信与量子计算机"重大项目 (2023ZD0301000)

Suppression of 1/f noise influence in delayed self‐heterodyne measurement of laser linewidth with kHz and below using short fiber

QIAN Cheng 1,2 , LIU Xiaobing2,3 , YANG Xiumei 2,4 , LI Chongyang 2,4 , HUANG Ruidong 2,4 , XUE Siming 2,3 , MAO Qinghe 2,3,4*

1 Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China; 2 Anhui Provincial Key Laboratory of Photonics Devices and Materials, Anhui Institute of Optical and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 3 Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, China; 4 School of Environmental Science and Optoelectronic Science and Technology, University of Science and Technology of China, Hefei 230026, China

Received:2024-03-15 Revised:2024-05-07 Published:2026-07-28 Online:2026-07-27

摘要/Abstract

摘要： 随着待测激光线宽逼近乃至突破1 kHz, 延时自外差测量法中的延时光纤长度需适当加长, 使得测量结果受到1/f 噪声影响。鉴于此, 本文针对短光纤延时自外差法测量千赫兹及以下激光线宽时的1/f 噪声影响与抑制问题开展了研究。研究结果表明, 1/f 噪声对短光纤延时自外差法所测延时自外差功率谱中央部分影响更大, 通过选取远离自外差功率谱中央的相干包络波峰波谷差值来反演激光线宽, 可以有效避免1/f 噪声的影响, 从而获取更准确的待测激光线宽。进一步通过实测两台千赫兹及以下的光纤激光器线宽, 并与基于频率噪声谱的β分割线法所得积分线宽相比较, 验证了该1/f 噪声补偿方法的有效性。

关键词: 光纤激光, 线宽测量, 延时自外差法, 1/f 噪声

Abstract: As the linewidth of the laser under test approaches or even breaks through 1 kHz, the length of the delay fiber in the delay self-heterodyne measurement method needs to be lengthened properly, so that the measurement results are affected by 1/f noise. In this paper, the influences of 1/f noise on the measurement accuracy of laser linewidth in the order of kHz and below using the delayed self-heterodyne method based on a short delay fiber, and the corresponding suppression technique, are investigated. Our research results show that 1/f noise has a greater influence on the central part of the delay self-heterodyne power spectrum measured by the delay self-heterodyne method using short delay fiber, so that by selecting the difference of the coherent envelope peak and valley far from the center of the self-heterodyne power spectrum to retrieve the laser linewidth, the influence of 1/f noise can be effectively avoided, thereby obtaining a more accurate linewidth of the measured laser. Furthermore, by measuring the fiber laser linewidths in the order of kHz and below, and comparing them with the integral linewidths obtained from the β-separation line based on the frequency noise spectrum, the effectiveness of the 1/f noise compensation method is verified.

Key words: fiber laser, linewidth measurement, delayed self-heterodyne, 1/f noise

中图分类号:

钱诚, 刘孝兵, 杨秀梅, 李重阳, 黄瑞冬, 薛驷明, 毛庆和, . 千赫兹及以下激光线宽短光纤延时自外差测量中 1/f 噪声影响的抑制[J]. 量子电子学报, 2026, 43(4): 623-631.

QIAN Cheng , , LIU Xiaobing, , YANG Xiumei , , LI Chongyang , , HUANG Ruidong , , XUE Siming , , MAO Qinghe , . Suppression of 1/f noise influence in delayed self‐heterodyne measurement of laser linewidth with kHz and below using short fiber[J]. Chinese Journal of Quantum Electronics, 2026, 43(4): 623-631.

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千赫兹及以下激光线宽短光纤延时自外差测量中 1/f 噪声影响的抑制

Suppression of 1/f noise influence in delayed self‐heterodyne measurement of laser linewidth with kHz and below using short fiber

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