FM Eliminated CH4 Locked Frequency Stabilization of 3.39 μm He-Ne Laser in Dual Feedback Control

Masataka Nakazawa, Jun Ichi Nakamura, Toshimitsu Musha

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The frequency of the 3.39 μm He-Ne laser was locked to the CH4 saturated absorption line by means of integral-proportional feedback control, i.e., dual feedback control. The frequency modulation was applied by a vibrating mirror placed outside a laser cavity, obtaining a modulation-free laser beam with a stabilized frequency. The long-term stability achieved under integral feedback control was about ±1.1 X 10-11, which was further improved to ±1.35 X 10–12 under dual feedback control. The Allan variance measured by the photomixing technique was 1.77 X 10–12 at an average time 100 s.

Original languageEnglish
Pages (from-to)103-108
Number of pages6
JournalIEEE Journal of Quantum Electronics
Volume17
Issue number1
DOIs
Publication statusPublished - 1981 Jan
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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