Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Laser frequency noise characterization by self-heterodyne with both long and short delay

Not Accessible

Your library or personal account may give you access

Abstract

We propose a novel approach to laser frequency noise characterization by delayed self-heterodyne. Compared with the traditional treatment, our method applies to both long and short delay, corresponding to uncorrelated and correlated self-heterodyne. In the case of long delay, it overcomes the influence of 1/f noise on the intrinsic linewidth extraction from a broadened spectrum, and the results are more accurate than Voigt profile fitting. For short delayed correlated heterodyne, it eliminates artifact peaks at multiples of the reciprocal of delay time introduced by transferring measured RF phase noise to laser phase noise, thus extending the measurement range. In addition, it calibrates the frequency noise overestimation caused by a finite noise floor. This method remains valid when the delay and the coherence time are comparable. Experimental results are presented to demonstrate the effectiveness of the proposed approach in characterizing lasers with intrinsic linewidth ranging from sub-100 Hz to megahertz.

© 2019 Optical Society of America

Full Article  |  PDF Article
More Like This
Line shape of a delayed self-heterodyne varied with noise types and delays

Zujie Fang, Fang Wei, Fei Yang, Dijun Chen, Qing Ye, Haiwen Cai, and Ronghui Qu
Appl. Opt. 61(13) 3761-3770 (2022)

Dynamic frequency-noise spectrum measurement for a frequency-swept DFB laser with short-delayed self-heterodyne method

Qian Zhou, Jie Qin, Weilin Xie, Zhangweiyi Liu, Yitian Tong, Yi Dong, and Weisheng Hu
Opt. Express 23(22) 29245-29257 (2015)

Polarization influence and its mitigation on laser frequency noise measurement by a short-delayed self-homodyne interference method

Jiejun Zhao, Fei Yang, Xi Zhang, Zhidan Ding, Rui Wu, and Haiwen Cai
Appl. Opt. 58(24) 6693-6699 (2019)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (13)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved