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Ricciardi I, Mosca S, Parisi M, et al. Sub-kilohertz linewidth narrowing of a mid-infrared optical parametric oscillator idler frequency by direct cavity stabilization. Opt Lett. 2015;40(20):4743-6doi: 10.1364/OL.40.004743.
Ricciardi, I., Mosca, S., Parisi, M., Maddaloni, P., Santamaria, L., De Natale, P., & De Rosa, M. (2015). Sub-kilohertz linewidth narrowing of a mid-infrared optical parametric oscillator idler frequency by direct cavity stabilization. Optics letters, 40(20), 4743-6. https://doi.org/10.1364/OL.40.004743
Ricciardi, I, et al. "Sub-kilohertz linewidth narrowing of a mid-infrared optical parametric oscillator idler frequency by direct cavity stabilization." Optics letters vol. 40,20 (2015): 4743-6. doi: https://doi.org/10.1364/OL.40.004743
Ricciardi I, Mosca S, Parisi M, Maddaloni P, Santamaria L, De Natale P, De Rosa M. Sub-kilohertz linewidth narrowing of a mid-infrared optical parametric oscillator idler frequency by direct cavity stabilization. Opt Lett. 2015 Oct 15;40(20):4743-6. doi: 10.1364/OL.40.004743. PMID: 26469609.
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Opt Lett. 2015 Oct 15;40(20):4743-6. doi: 10.1364/OL.40.004743.

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

Optics letters

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

PMID: 26469609 DOI: 10.1364/OL.40.004743

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 10(3)  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.

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