We have observed far‐infrared radiation generated by picosecond pulses in LiNbO3 with several different phase‐matching conditions. The output spectra, analyzed by a far‐infrared Michelson interferometer and by a Fabry‐Perot interferometer, agree well with theoretical calculations. The laser pulsewidth deduced from these measurements was about 2 psec in comparison with 5 psec obtained from two‐photon fluorescence measurements.

Topics
Infrared radiation, Fabry-Perot interferometers, Fluorescence, Interferometry, Optical phase matching, Oxides
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© 1971 The American Institute of Physics.
1971
The American Institute of Physics
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