Trivalent ytterbium has been shown to have favorable properties over trivalent neodymium as a 1 /spl mu/m laser source when pumped at 940 or 968 nanometers. These properties include a broader absorption band, a longer fluorescence lifetime and smaller photon decrement between the pump beam and the Yb/sup 3+/ laser emission. An additional feature of the ytterbium ion is a broader fluorescence linewidth (compared to Nd/sup 3+/:YAG) which allows for tunable performance and flexibility in the selection of an output wavelength. The simple energy level scheme of Yb/sup 3+/ makes it useful for resonant pumping without the inherent problems of excited state absorption and upconversion processes. In the paper the authors report on the performance of Yb:YAG and Yb:GSGG with CW pumping.
Tunable ytterbium lasers
Proceedings of LEOS'94 ; 2 ; 421-422 vol.2
1994-01-01
92948 byte
Conference paper
Electronic Resource
English
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