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 ~4-ps pulses. OPA gains in excess of 75 dB and pump–signal conversion efficiencies of ~39% (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 (>18-kW) picosecond pulses with a time–bandwidth produce of ~0.65, some ten times less than from a free-running OPG. Using such an approach, we obtain 2.7-ps 50-nJ pulses at 1.310 μm .
© 1998 Optical Society of America
[of America ]
P. E. Britton, N. G. R. Broderick, D. J. Richardson, P. G. R. Smith, G. W. Ross, and D. C. Hanna, "Wavelength-tunable high-power picosecond pulses from a fiber-pumped diode-seeded high-gain parametric amplifier," Opt. Lett. 23, 1588-1590 (1998)