Sub-kilohertz linewidth narrowing of a mid-infrared optical parametric oscillator idler frequency by direct cavity stabilization

Year: 2015

Authors: Ricciardi I., Mosca S., Parisi M., Maddaloni P., Santamaria L., De Natale P., De Rosa M.

Autors Affiliation: CNR-INO, Istituto Nazionale di Ottica, Via Campi Flegrei 34, Pozzuoli (NA), 80078, Italy; CNR-INO, Istituto Nazionale di Ottica, largo E. Fermi 6, Firenze, 50125, Italy

Abstract: We stabilize the idler frequency of a singly resonant optical parametric oscillator directly to the resonance of a mid-infrared Fabry-Perot reference cavity. This is accomplished by the Pound-Drever-Hall locking scheme, controlling either the pump laser or the resonant signal frequency. A residual relative frequency noise power spectral density below 103 Hz(2)/Hz is reached on average, with a Gaussian linewidth of 920 Hz over 100 ms, which reveals the potential for reaching spectral purity down to the hertz level by locking the optical parametric oscillator against a mid-infrared cavity with state-of-the-art superior performance. (C) 2015 Optical Society of America

Journal/Review: OPTICS LETTERS

Volume: 40 (20)      Pages from: 4743  to: 4746

KeyWords: Fabry-Perot interferometers; Infrared devices; Locks (fasteners); Optical parametric oscillators; Power spectral density; Pumping (laser); Spectral density, Linewidth narrowing; Midinfrared; Pound-Drever-Hall locking; Relative frequencies; Resonant signal; Singly-resonant optical parametric oscillators; Spectral purity; State of the art, Parametric oscillators
DOI: 10.1364/OL.40.004743

Citations: 16
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