Abstract

Laser-pumped laser characteristics of a Tm:Ho:Y3Al5O12(YAG) crystal were measured as a function of the wavelength and energy of the alexandrite-laser pump source. Laser thresholds and slope efficiencies were recorded for 765-, 780-, and 785-nm pump wavelengths. Simultaneous laser emission was observed at 2.060, 2.065, 2.097, and 2.101 μm, and the relative intensities of these peaks were measured as a function of absorbed pump energy. Changes in temporal and spectral profiles of the laser emission were observed with variations in absorbed pump energy. When measurements were made with a monolithic crystal cavity instead of an open cavity, laser emission from Ho3+ was observed at 2.097 μm, and an additional laser peak was observed that may be due to transitions of the Tm3+ ions.

© 1991 Optical Society of America

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