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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 12 — Jun. 17, 2013
  • pp: 14832–14840

A novel frequency control scheme for comb-referenced sensitive difference-frequency-generation spectroscopy

Kana Iwakuni, Sho Okubo, and Hiroyuki Sasada  »View Author Affiliations

Optics Express, Vol. 21, Issue 12, pp. 14832-14840 (2013)

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We present a novel scheme of frequency scan and wavelength modulation of a difference-frequency-generation source for comb-referenced sensitive spectroscopy. While the pump and signal frequencies are phase-locked to an optical frequency comb (OFC), the offset frequency between the signal wave and the nearest comb tooth is modulated to apply a wavelength-modulation technique, and the idler wave frequency is repeatedly swept for signal accumulation by changing the repetition frequency of the OFC. The spectrometer is applied to absolute frequency measurement of weak hyperfine-resolved rovibration transitions of the ν1 band of CH3I, and the uncertainty in frequency determination is reduced by one order of magnitude in compared with that of the previous work published in Optics Express 20, 9178-9186 (2012).

© 2013 OSA

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6390) Spectroscopy : Spectroscopy, molecular
(300.6460) Spectroscopy : Spectroscopy, saturation

ToC Category:

Original Manuscript: March 13, 2013
Revised Manuscript: May 16, 2013
Manuscript Accepted: June 10, 2013
Published: June 14, 2013

Kana Iwakuni, Sho Okubo, and Hiroyuki Sasada, "A novel frequency control scheme for comb-referenced sensitive difference-frequency-generation spectroscopy," Opt. Express 21, 14832-14840 (2013)

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