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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 8 — Apr. 9, 2012
  • pp: 9178–9186

Frequency-comb-referenced singly-resonant OPO for sub-Doppler spectroscopy

I. Ricciardi, E. De Tommasi, P. Maddaloni, S. Mosca, A. Rocco, J.-J. Zondy, M. De Rosa, and P. De Natale  »View Author Affiliations

Optics Express, Vol. 20, Issue 8, pp. 9178-9186 (2012)

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We present a widely-tunable, singly-resonant optical parametric oscillator, emitting more than 1 W between 2.7 and 4.2 μm, which is phase locked to a self-referenced frequency comb. Both pump and signal frequencies are directly phase-locked to the frequency comb of a NIR-emitting fs mode-locked fibre laser, linked, in turn, to the caesium primary standard. We estimate for the idler frequency a fractional Allan deviation of ∼ 3 × 10−12τ−1/2 between 1 and 200 s. To test the spectroscopic performance of the OPO, we carried out saturation spectroscopy of several transitions belonging to the ν1 rovibrational band of CH3I, resolving their electronic quadrupole hyperfine structure, estimating a linewidth better than 200 kHz FWHM for the idler, and determining the absolute frequency of the hyperfine components with a 50-kHz-uncertainty.

© 2012 OSA

OCIS Codes
(020.2930) Atomic and molecular physics : Hyperfine structure
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(300.6320) Spectroscopy : Spectroscopy, high-resolution

ToC Category:

Original Manuscript: February 8, 2012
Revised Manuscript: March 22, 2012
Manuscript Accepted: March 26, 2012
Published: April 5, 2012

I. Ricciardi, E. De Tommasi, P. Maddaloni, S. Mosca, A. Rocco, J.-J. Zondy, M. De Rosa, and P. De Natale, "Frequency-comb-referenced singly-resonant OPO for sub-Doppler spectroscopy," Opt. Express 20, 9178-9186 (2012)

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