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We present a narrow-linewidth, singly-resonant cw optical parametric oscillator, emitting more than 1 W in the 2.7-4.2 μm range. The OPO is pumped by a narrow linewidth (40 kHz) fibre-laser system and the signal frequency is locked to a high-finesse Fabry-Pé rot cavity in order to increase the spectral resolution, thus obtaining a residual linewidth of 70 kHz for the signal. We tested the spectral performance of our OPO on several transitions in the v 1 rovibrational band of CH 3 I, measuring line intensities and showing sub-Doppler dip detection.
Taylor and Francis
Publication date: 
1 Sep 2012

I Ricciardi, E De Tommasi, P Maddaloni, S Mosca, A Rocco, JJ Zondy, M De Rosa, P De Natale

Biblio References: 
Volume: 110 Issue: 17 Pages: 2103-2109
Molecular Physics