Femtosecond optical parametric oscillator continuously tunable across 3.6-8  μm based on orientation-patterned gallium phosphide

We report a synchronously-pumped femtosecond optical parametric oscillator (OPO) based on orientation-patterned gallium phosphide (OP-GaP), providing continuously tunable mid-infrared (mid-IR) idler radiation across 3570-7892 nm (2801-1267  cm ), by exploiting pump wavelength tuning. We generate up...

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Bibliographic Details
Published inOptics letters Vol. 44; no. 18; p. 4570
Main Authors O'Donnell, Callum F, Chaitanya Kumar, S, Schunemann, P G, Ebrahim-Zadeh, M
Format Journal Article
LanguageEnglish
Published United States 15.09.2019
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Summary:We report a synchronously-pumped femtosecond optical parametric oscillator (OPO) based on orientation-patterned gallium phosphide (OP-GaP), providing continuously tunable mid-infrared (mid-IR) idler radiation across 3570-7892 nm (2801-1267  cm ), by exploiting pump wavelength tuning. We generate up to 54 mW of output average power at 80 MHz, and quantum conversion efficiencies up to 28.9% are achieved by use of synchronized pump retroreflection. With the inclusion of intracavity dispersion compensation in an OP-GaP OPO, near-transform-limited signal pulse durations of 112 fs at 1288 nm are measured, and peak powers up to 3 kW in the mid-IR are inferred. Finally, evidence of three-photon absorption is observed and characterized near the pump wavelength.
ISSN:1539-4794
DOI:10.1364/OL.44.004570