DocumentCode :
1050939
Title :
Pump Uniformity and Temperature Profile Measurements in a Planar Waveguide Nd:YAG Laser by a Beam Deflection Method
Author :
Sun, Fei ; Baker, Howard J. ; Russell, Adam B. ; Valera, Jesus D. ; Hall, Denis R.
Author_Institution :
Heriot-Watt Univ., Edinburgh
Volume :
43
Issue :
8
fYear :
2007
Firstpage :
669
Lastpage :
675
Abstract :
A planar waveguide laser using a large-core Nd:YAG waveguide and face-pumping by diode bars has produced a multimode power up to 160 W, with direct-contact water-cooling across the largest faces of the waveguide in the lateral direction. A method is reported that measures the nonuniform heat dissipation in the waveguide core and nonuniform water-cooling through deflection of a helium-neon laser beam passing through the waveguide claddings. Temperature gradients resulting from the varying heat transfer coefficient to the coolant are quantified, together with lateral thermal lens effects associated with edge-cooling and nonuniform pumping. The heat flux in the claddings is compared for two different waveguide structures, giving information on multipass face-pumping efficiency and uniformity.
Keywords :
laser beams; neodymium; optical planar waveguides; solid lasers; temperature measurement; waveguide lasers; Nd:Y3Al5O12 laser; beam deflection method; coolant; diode bars; face pumping; heat dissipation; heat transfer coefficient; planar waveguide Nd:YAG laser; pump uniformity; temperature gradients; temperature profile measurements; water cooling; waveguide claddings; Bars; Diodes; Laser beams; Laser excitation; Planar waveguides; Power lasers; Pump lasers; Temperature measurement; Water heating; Waveguide lasers; Beam deflection; cooling uniformity; planar waveguide laser; pump uniformity;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.2007.899501
Filename :
4268362
Link To Document :
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