Gain depletion due to amplified spontaneous emission in multi-pass laser amplifiers |
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Authors: | I Okuda M J Shaw |
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Institution: | (1) Rutherford Appleton Laboratory, OX11 OQX Chilton, Didcot, Oxon, UK |
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Abstract: | Calculations of the effects of amplified spontaneous emission (ASE) in laser amplifiers designed to amplify sub-picosecond pulses are presented. A one-dimensional code is used with some simple approximations to account for aspect ratio variation in cases of cylindrical symmetry. Gain depletion due to ASE is compared for various multi-pass geometries. Optimisation for short pulse amplification of a telescopic, beam-expanding, 4-pass amplifier is considered.On leave from Electrotechnical Laboratory, Tsukuba, Ibaraki, Japan |
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Keywords: | 42 60 42 55 Gp |
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