采用马赫-曾德尔和迈克尔逊干涉仪对激光线宽进行延时自外差干涉测量的比较。

A comparison of delayed self-heterodyne interference measurement of laser linewidth using Mach-Zehnder and Michelson interferometers.

机构信息

Interdisciplinary Photonics Laboratories, School of Chemistry, University of Sydney, 2006, NSW, Australia.

出版信息

Sensors (Basel). 2011;11(10):9233-41. doi: 10.3390/s111009233. Epub 2011 Sep 27.

DOI:10.3390/s111009233

PMID:22163692

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3231253/

Abstract

Linewidth measurements of a distributed feedback (DFB) fibre laser are made using delayed self heterodyne interferometry (DHSI) with both Mach-Zehnder and Michelson interferometer configurations. Voigt fitting is used to extract and compare the Lorentzian and Gaussian linewidths and associated sources of noise. The respective measurements are w(L) (MZI) = (1.6 ± 0.2) kHz and w(L) (MI) = (1.4 ± 0.1) kHz. The Michelson with Faraday rotator mirrors gives a slightly narrower linewidth with significantly reduced error. This is explained by the unscrambling of polarisation drift using the Faraday rotator mirrors, confirmed by comparing with non-rotating standard gold coated fibre end mirrors.

摘要

采用马赫-曾德尔（Mach-Zehnder）和迈克尔逊（Michelson）干涉仪两种配置的延迟自外差干涉法（DHSI）对分布式反馈（DFB）光纤激光器的线宽进行了测量。采用Voigt 拟合提取并比较了洛伦兹（Lorentzian）和高斯（Gaussian）线宽以及相关噪声源。相应的测量结果为 w(L)（MZI）=（1.6±0.2）kHz 和 w(L)（MI）=（1.4±0.1）kHz。采用带有法拉第旋转镜的迈克尔逊干涉仪给出了稍窄的线宽，且误差明显减小。这可以通过法拉第旋转镜来消除偏振漂移来解释，通过与不旋转的标准镀金光纤端镜进行比较得到了证实。