Features of a CPT-based atomic clock with pumping by different-order sidebands of a VCSEL's frequency

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Presented for the first time is our research into reduction of energy consumption of miniaturised Rb atomic clocks based on coherent population trapping (CPT) effect at lowered microwave modulation frequency. We studied properties of a CPT-based atomic frequency standard pumped with multi-frequency radiation from sidebands of a single-frequency semiconductor laser whose injection current was modulated at subharmonics (1/2-1/6) of the frequency of Rb hyperfine ground state splitting. Pumping by third-order sidebands is the optimum when the atomic clock stability drops only slightly (by 11%), whereas energy consumption of the microwave components is reduced by a factor of 1.5.

Original languageEnglish
Title of host publicationQuantum and Nonlinear Optics VI
EditorsQihuang Gong, Guang-Can Guo, Byoung Seung Ham
Number of pages6
ISBN (Electronic)9781510631076
ISBN (Print)978-1-5106-3107-6
Publication statusPublished - 19 Nov 2019
EventQuantum and Nonlinear Optics VI 2019 - Hangzhou, China
Duration: 21 Oct 201922 Oct 2019

Publication series

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


ConferenceQuantum and Nonlinear Optics VI 2019


  • Atomic clock
  • CPT resonance
  • electro-optical systems


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