Controlling the width of picosecond laser pulses |
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Authors: | H Al-Obaidi RJ Dewhurst D Jacoby GA Oldershaw SA Ramsden |
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Institution: | Department of Applied Physics, University of Hull, Hull, HU6 7RX, UK |
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Abstract: | The relaxation time τR of the saturable dye used to mode-lock a Nd: YAG laser has been changed using different dyes or dye solvent mixtures and the laser bandwidth Δω changed by the insertion of an etalon. The pulse duration τp was approximately transform-limited for τR<2π/Δω but increased to about twice this value when 2π/Δω<τp<τR. No significant increase in pulse duration was observed for τR?2π/Δω but multiple pulses were generated within each round-trip-transit-time. |
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