Abstract

Tunable subpicosecond pulses are generated by synchronously pumping a dye laser with the pulse-compressed and frequency-doubled output of an acousto-optically mode-locked cw Nd:YAG laser. The pulses are amplified at a repetition rate of 1 kHz, using the frequency-doubled output of a cavity-dumped, acousto-optically mode-locked, Q-switched, cw pumped Nd:YAG laser. Amplified transform-limited pulses of 150–300 fsec have been obtained in the wavelength range of 560–680 nm (R6G and DCM dyes) with a maximum energy of 50 μJ. Since there is no intracavity prism compensation and no recompression stage after the amplifier, the system is tuned easily with a single-plate birefringent filter; only cavity-length adjustment is required. An electronic control system eliminates amplitude fluctuations caused by timing jitter between the 70-psec amplifying pulses and the dye pulses.

© 1989 Optical Society of America

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