Efficient half-harmonic generation of three-optical-cycle mid-IR frequency comb around 4 µm using OP-GaP

We report a broadband mid-infrared frequency comb with three-optical-cycle pulse duration centered around 4.2 µm, via half-harmonic generation using orientation-patterned GaP (OP-GaP) with ~43% conversion efficiency. We experimentally compare performance of GaP with GaAs and lithium niobate as the n...

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Published inOptics express Vol. 26; no. 8; pp. 9963 - 9971
Main Authors Sorokin, Evgeni, Marandi, Alireza, Schunemann, Peter G, Fejer, M M, Byer, Robert L, Sorokina, Irina T
Format Journal Article
LanguageEnglish
Published United States 16.04.2018
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Summary:We report a broadband mid-infrared frequency comb with three-optical-cycle pulse duration centered around 4.2 µm, via half-harmonic generation using orientation-patterned GaP (OP-GaP) with ~43% conversion efficiency. We experimentally compare performance of GaP with GaAs and lithium niobate as the nonlinear element, and show how properties of GaP at this wavelength lead to generation of the shortest pulses and the highest conversion efficiency. These results shed new light on half-harmonic generation of frequency combs, and pave the way for generation of short-pulse intrinsically-locked frequency combs at longer wavelengths in the mid-infrared with high conversion efficiencies.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.26.009963