DocumentCode :
1081773
Title :
Effects of high density pumping on relaxation oscillations and mode spectra in lasers
Author :
Otsuka, Kenju ; Kubodera, Ken´ichi
Author_Institution :
Nippon Telegraph and Telephone Public Corporation, Tokyo, Japan
Volume :
16
Issue :
4
fYear :
1980
fDate :
4/1/1980 12:00:00 AM
Firstpage :
419
Lastpage :
424
Abstract :
Effects of high density pumping on relaxation oscillations and mode spectra are investigated in LiNdP4O12(LNP) lasers. It is shown that high density pumping reduces the spatial population inhomogenuity, which is due to periodic inversion saturation by a first lasing mode in the crystal, and results in spontaneous single longitudinal mode oscillations even at high excitation rates. Physical interpretations are given for single-mode operations on the basis of Auger recombination (annihilation) process for 1.048 and 1.32 μm quantums in LNP lasers. An effective diffusion parameter of excited states is shown in an increase with absorbed pump power density through the Auger process. Observed relaxation oscillation waveforms, which disagreed with the traditional laser dynamic theory, are found to be explained well by the rate equations, including the effective diffusion constant.
Keywords :
Neodymium:solid lasers; Relaxation processes; Chemical engineering; Chemical lasers; Chemistry; Laser excitation; Laser modes; Laser theory; Physics; Power lasers; Pump lasers; Quantum dot lasers;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.1980.1070506
Filename :
1070506
Link To Document :
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