New method of wavelength stabilisation in CPT atomic clocks

Sergey Kobtsev, Daba Radnatarov, Sergey Khripunov, Valerii Andryushkov, Yurii Zarudnev

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

1 Citation (Scopus)


We propose a novel way of radiation wavelength stabilisation in atomic clocks based on coherent population trapping (CPT). It uses quadrature-phase component of the CPT signal within the CPT resonance feedback loop and automatic wavelength locking of radiation from a VCSEL to the atomic absorption line. We demonstrate advantages and limitations of the new method applied to vapour cells with buffer gas or anti-relaxation coating. Also provided are measurements of short- and long-term stability of a CPT-based atomic clock using the proposed method with various optical cells. Discussed are the prospects of this method in chip-scale atomic clocks.

Original languageEnglish
Title of host publicationOptoelectronic Devices and Integration VIII
EditorsXuping Zhang, Baojun Li, Changyuan Yu, Xinliang Zhang, Daoxin Dai
Number of pages6
ISBN (Electronic)9781510630857
Publication statusPublished - 19 Nov 2019
EventOptoelectronic Devices and Integration VIII 2019 - Hangzhou, China
Duration: 22 Oct 201923 Oct 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceOptoelectronic Devices and Integration VIII 2019


  • Atomic clock
  • CPT resonance
  • Optic cell
  • Quadrature signal
  • Rubidium
  • optic cell
  • rubidium
  • quadrature signal


Dive into the research topics of 'New method of wavelength stabilisation in CPT atomic clocks'. Together they form a unique fingerprint.

Cite this