Absolute frequency measurement of the saturated absorption lines of methane in the 1.66 μm region

Chikako Ishibashi, Motonobu Kourogi, Kazuhiro Imai, Bambang Widiyatmoko, Atsushi Onae, Hiroyuki Sasada

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We have determined the absolute frequencies of the R(0) and Q(1) transitions of the 2ν3 band of 12CH4 in the 1.66-μm region to be 180.345 065 08(37) and 180.021 253 10(61) THz. The numbers in parentheses are the standard deviations in units of the last digit of the quoted frequencies. We have used the 1.54-μm saturated absorption line of 13C2H2 as a frequency reference and an optical frequency comb generator for bridging the frequency difference of 14 THz between the 1.66- and 1.54-μm radiations.

Original languageEnglish
Pages (from-to)223-226
Number of pages4
JournalOptics Communications
Volume161
Issue number4
DOIs
Publication statusPublished - 1999 Mar 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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