Multipass amplifier for femtosecond optical pulses
| Autor: | Richard L. Fork, H. L. Fragnito, P. C. Becker, C. H. Hirlimann |
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| Rok vydání: | 1988 |
| Zdroj: | Annual Meeting Optical Society of America. |
| DOI: | 10.1364/oam.1988.mn1 |
| Popis: | We describe a multipass optical amplifier based on a double confocal geometry1 which we have used to amplify femtosecond optical pulses to energies of 90 nJ using only 0.7 W of pump power from a Metalaser copper vapor laser operated at 10 kHz. We use four mirrors of 20-cm radius arranged so that an incident train of pulses passes six times through a gain jet containing a mixture of rhodamine 640 and sulforhodamine 640 in ethylene glycol. The amplified pulses, which have durations of ~50 fs, are sufficiently intense to generate white light continuum pulses in an optical fiber with a 4-μm core. |
| Databáze: | OpenAIRE |
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