High power output quasi-continuous-wave nanosecond optical parametric generator based on periodically poled lithium niobate

Abstract

We report on a high power output quasi-continuous-wave nanosecond optical parametric generator (OPG) of congruent periodically poled lithium niobate (PPLN) pumped by a 1064 nm acousto-opticallyQ-switched Nd: YVO₄ laser (duration: 70 ns, repetition rate: 45 kHz, spatial beam qualityM²< 1.3). The OPG consists of a 38.7 mm long PPLN crystal with a domain period of 28.93 μ. With 5.43 W of average pump power the maximum average output power is 991 mW at 1517.1 nm signal wave of the PPLN OPG.

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