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01297 am a22001813u 4500 |
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77855 |
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|a Britton, P.E.
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|a Broderick, N.G.R.
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|a Richardson, D.J.
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|a Smith, P.G.R.
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|a Ross, G.W.
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|a Hanna, D.C.
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|a Wavelength-tunable high-power picosecond pulses from a fibre pumped diode-seeded high-gain parametric amplifier
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|c 1998-10-15.
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|z Get fulltext
|u https://eprints.soton.ac.uk/77855/1/1701.pdf
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|a 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. 45nJ OPG thresholds and 34% pump-signal conversion efficiencies are obtained for ~4ps pulses. OPA gains in excess of 75dB 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 (>18kW) 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 2.7ps 50nJ pulses at 1.310µm.
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