Temporally coincident ultrashort pulses from synchronously pumped tunable dye lasers

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Abstract
The temporal and spectral character of the picosecond pulses from a dye laser which was synchronously pumped by a frequency‐doubled mode‐locked Nd:glass laser was studied with an ultrafast streak camera. For matched pump and dye laser cavity lengths, the observed dye pulses were of 15‐psec duration and were in very close temporal synchronism with the pump pulses. For deviations from match >0.1 mm, severe aberrations in pulse character began to occur. Spectral tuning of the dye laser was achieved with a narrow‐gap etalon. The utility of such lasers in producing two independently tunable time‐synchronized ultrashort pulses for parametric frequency generation and spectroscopic studies is discussed.