DocumentCode :
1129836
Title :
CW laser at room temperature using vitreous substances
Author :
Deutschbein, O.K. ; Pautrat, C.C.
Author_Institution :
Centre National d́Etudes de télécommunications, France
Volume :
4
Issue :
2
fYear :
1968
fDate :
2/1/1968 12:00:00 AM
Firstpage :
48
Lastpage :
51
Abstract :
With the aim of finding laser glasses operating in CW at room temperature, a comparative study was made of various neodymium-doped vitreous substances: silicate, borate, germanate, phosphate, and fluoride glasses. About 500 samples of phosphate glasses, doped with neodymium, were prepared and their optical properties studied. The phosphate glasses have three main advantages for laser action. 1) The fluorescence band is narrower than in silicate glasses and can be as sharp as 153 Å. 2) The optical pumping is more efficient in phosphate glasses. 3) The lifetime of the 4F3/2level is about 300 μs. The phosphate glasses have very interesting laser characteristics, i.e., in pulsed operation the threshold is 1 joule. Such a rod exhibits semicontinuous operation at room temperature pumped by a krypton arc lamp; when excited in ac, the threshold is about 1 kW. It was found that the fluoride glasses have even more promising laser properties.
Keywords :
Bandwidth; Electromagnetic wave absorption; Fluorescence; Gas lasers; Glass; Infrared detectors; Laser transitions; Optical materials; Power lasers; Temperature;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.1968.1075027
Filename :
1075027
Link To Document :
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