Analysis of parametric fluorescence amplified in a noncollinear optical parametric amplifier pumped by the second harmonic of a femtosecond Yb:KGW laser

T. Stanislauskas, I. Balčiūnas, V. Tamuliene, R. Budriūnas, A. Varanavičius

Abstract


We present the results of theoretical and experimental investigation of amplified parametric fluorescence (APF) produced in a high-gain BBO-based femtosecond noncollinear optical parametric amplifier (OPA) pumped at 515 nm. Differences of APF levels in Poynting vector walk-off-compensating and tangential phase-matching amplification geometries are examined. APF suppression due to the presence of a seed pulse in the OPA is measured and is found to be around 6 times in typical OPA operating conditions when pump-to-signal conversion efficiency is 11.5%.

Keywords


parametric fluorescence; optical parametric amplifier; contrast

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DOI: https://doi.org/10.3952/physics.v56i1.3271

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ISSN 1648-8504 (Print)
ISSN 2424-3647 (Online)