Laser frequency stabilization by combining modulation transfer and frequency modulation spectroscopy

Fei Zi, Xuejian Wu, Weicheng Zhong, Richard H. Parker, Chenghui Yu, Simon Budker, Xuanhui Lu, Holger Müller

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


We present a hybrid laser frequency stabilization method combining modulation transfer spectroscopy (MTS) and frequency modulation spectroscopy (FMS) for the cesium D2 transition. In a typical pump-probe setup, the error signal is a combination of the DC-coupled MTS error signal and the AC-coupled FMS error signal. This combines the long-term stability of the former with the high signal-to-noise ratio of the latter. In addition, we enhance the long-term frequency stability with laser intensity stabilization. By measuring the frequency difference between two independent hybrid spectroscopies, we investigate the short-and long-term stability. We find a long-term stability of 7.8 kHz characterized by a standard deviation of the beating frequency drift over the course of 10 h and a short-term stability of 1.9 kHz characterized by an Allan deviation of that at 2 s of integration time.

Original languageEnglish (US)
Pages (from-to)2649-2652
Number of pages4
JournalApplied Optics
Issue number10
StatePublished - Apr 1 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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