ISSN:
1432-0649
Keywords:
42.50.Ne
;
42.52.+x
;
42.55.*
;
42.65.*
;
42.50.Ar
;
42.50.Lc
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The amplitude of standing wave solid state lasers with frequency conversion inside the resonator can become unstable. We investigated the amplitude fluctuations of an end-pumped Nd:YAG-laser at low pump rates (below 160% threshold pump power) and also above. Detecting the individual mode instabilities separately and comparing them with a theoretical laser model, we can trace the origin of the mechanism leading to the observed fluctuations. At certain well defined discrete pump levels above 160% threshold the instabilities disappear. These stable emission states are associated with particular nonconventional mode patterns, some of them exhibiting a helical phase structure. Based on experimental observations and computer simulations of pump induced resonator aberrations we describe a mechanism for the emergence of the peculiar transversal modes and laser fluctuations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01828736
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