Abstract

A technique is described for performing nanosecond time-resolved spectroscopy for situations of extremely low emission rates. The system utilizes a N2 laser pumped tunable dye laser and single photon time correlation techniques. It is applicable where there is need for nanosecond time resolution on emission which is either long-lived or has extremely low quantum efficiency and especially where monochromatic excitation is required. The technique is applied to the relaxation between a pair of excited states of Tb3+:Y(OH)3, where 5-nsec temporal resolution with 2- cm−1 spectral resolution is easily obtained.

© 1977 Optical Society of America

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