Title :
Laser action of Pr/sup 3+/ in LiYF/sub 4/ and spectroscopy of Eu/sup 2+/-sensitized Pr in BaY/sub 2/F/sub 8/
Author :
Knowles, David S. ; Zhang, Z. ; Gabbe, David ; Jenssen, H.P.
Author_Institution :
Crystal Phys. & Opt. Electron. Lab., MIT, Cambridge, MA, USA
fDate :
6/1/1988 12:00:00 AM
Abstract :
Laser action in flashlamp-pumped Pr:LiYF/sub 4/ at room temperature is observed at 640 nm with a 15-J threshold, but only approximately 0.01% slope efficiency. Increased efficiency from sensitizing the Pr with Eu/sup 2+/ is explored in the system Eu,Pr:BaY/sub 2/F/sub 8/. Co doped samples have been grown by the Czochralski growth method, and energy transfer between Eu/sup 2+/ and Pr/sup 3+/ is observed to be very weak. This is probably due to the poor overlap of the Eu/sup 2+/ emission with the Pr/sup 3+/ absorption lines, leading to the conclusion that hosts with a stronger crystal field at the Eu/sup 2+/ site need to be identified.<>
Keywords :
barium compounds; europium; laser transitions; lithium compounds; praseodymium; solid lasers; 15 J; 640 nm; BaY/sub 2/F/sub 8/:Eu,Pr; Czochralski growth method; LiYF/sub 4/:Pr/sup 3+/; absorption lines; crystal field; energy transfer; flashlamp pumping; spectroscopy; Absorption; Optical distortion; Optical materials; Optical pumping; Physics; Pulse measurements; Pump lasers; Spectroscopy; Stimulated emission; Temperature measurement;
Journal_Title :
Quantum Electronics, IEEE Journal of
