Abstract
Recently, we have developed a high-repetition-rate tunable picosecond UV light source by means of sum frequency generation and applied it to the measurement of time-resolved exciton luminescence.1) In this report, we present its extension to a nonlinear regime: the biexciton luminescence in CuCl via two- photon absorption.2) The observed line is found narrower and its lifetime is shorter (nearly "transform limited”) than those by previous measurements with strong excitation.3’4) Using this two-photon process, we have also measured the auto-correlation of the weak UV pulses which is too weak for the ordinary pulsewidth measurements.
© 1988 Optical Society of America
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