The performance of rare-earth based solid state laser materials is dependent on photophysical processes that can be quite complicated owing to processes such as energy transfer, cross-relaxation, and upconversion. It is desirable to track these processes and determine which levels get populated in what time scale and how these dynamics are affected by pump wavelength, duration, and crystal temperature. To this end a multi-dimensional spectroscopic facility utilizing a Bruker 66 step-scan interferometer has been constructed which is capable of simultaneous high spectral and temporal resolution in both excitation and emission. This system is capable of measuring rise and fall times of multiple lines and multiple manifolds over a 10,000 cm−1 range simultaneously following narrowband 5 ns pulsed excitation. The UV-IR range can be covered with sub-wavenumber resolution in both excitation and emission.

© 1996 Optical Society of America

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