We describe a high-gain optical parametric amplifier (OPA) and optical parametric generator (OPG) system pumped by a fiber chirped-pulse amplification source based on novel large-mode-area fiber components. 45-nJ OPG thresholds and 34% pump–signal conversion efficiencies are obtained for pulses. OPA gains in excess of 75 dB and pump–signal conversion efficiencies of (external) are demonstrated. Furthermore, we show that injection seeding of such high-gain parametric devices by use of a low-power continuous-wave beam results in high-power picosecond pulses with a time–bandwidth produce of , some ten times less than from a free-running OPG. Using such an approach, we obtain 2.7-ps 50-nJ pulses at .
© 1998 Optical Society of AmericaFull Article | PDF Article
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