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Correlated self-heterodyne method for ultra-low-noise laser linewidth measurements

Yuan, Zhiquan and Wang, Heming and Liu, Peng and Li, Bohan and Shen, Boqiang and Gao, Maodong and Chang, Lin and Jin, Warren and Feshali, Avi and Paniccia, Mario and Bowers, John and Vahala, Kerry (2022) Correlated self-heterodyne method for ultra-low-noise laser linewidth measurements. Optics Express, 30 (14). pp. 25147-25161. ISSN 1094-4087. doi:10.1364/oe.458109.

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Narrow-linewidth lasers are important to many applications spanning precision metrology to sensing systems. Characterization of these lasers requires precise measurements of their frequency noise spectra. Here we demonstrate a correlated self-heterodyne (COSH) method capable of measuring frequency noise as low as 0.01 Hz²/Hz at 1 MHz offset frequency. The measurement setup is characterized by both commercial and lab-built lasers, and features low optical power requirements, fast acquisition time and high intensity noise rejection.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Wang, Heming0000-0003-3861-0624
Liu, Peng0000-0002-8188-632X
Shen, Boqiang0000-0003-0697-508X
Gao, Maodong0000-0002-7791-0008
Chang, Lin0000-0001-5311-3349
Jin, Warren0000-0002-4297-7982
Bowers, John0000-0003-4270-8296
Vahala, Kerry0000-0003-1783-1380
Alternate Title:Towards milli-Hertz laser frequency noise on a chip
Additional Information:© 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement. Received 16 Mar 2022; accepted 14 Jun 2022; published 27 Jun 2022. The authors acknowledge Q. Yang and Y. Lai for helpful discussions. Funding. Defense Advanced Research Projects Agency (HR001-20-2-0044); Air Force Office of Scientific Research (FA9550-18-1-0353). Data availability. Data underlying the results presented in this paper may be obtained from the authors upon reasonable request. Code that processes oscilloscope data has been released as a Python package (pycosh) and can be found at the Python Package Index website. The authors declare no conflicts of interest.
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)HR001-20-2-0044
Air Force Office of Scientific Research (AFOSR)FA9550-18-1-0353
Issue or Number:14
Record Number:CaltechAUTHORS:20220722-768617000
Persistent URL:
Official Citation:Zhiquan Yuan, Heming Wang, Peng Liu, Bohan Li, Boqiang Shen, Maodong Gao, Lin Chang, Warren Jin, Avi Feshali, Mario Paniccia, John Bowers, and Kerry Vahala, "Correlated self-heterodyne method for ultra-low-noise laser linewidth measurements," Opt. Express 30, 25147-25161 (2022)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115759
Deposited By: George Porter
Deposited On:27 Jul 2022 14:45
Last Modified:27 Jul 2022 14:45

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