The construction of a Nd: YAG laser and observation of the output
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Authors
Chung, Ki Hyun
Subjects
Laser
Nd:YAG
Nd:YAG
Advisors
Cooper, A. W.
Date of Issue
1983
Date
December 1983
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
An experimental CW Neodymium-YAG laser has been constructed
using a gold coated circular cylindrical pumping
cavity. The rod is located along the cylinder axis and is
pumped by three tungsten-halide filament lamps symmetrically
spaced at equal radial distances from the rod. The resonator
consists of a concave 100 percent reflecting mirror and a
flat output mirror with variable axial spacing.
Lasing threshold was achieved at an input power of 2000
watts with the lamps 12 millimeters from the rod, using a
6.1 percent transmittance output mirror. Threshold was
not achieved with* a 27 percent transmittance mirror.
A maximum CW output of 2.05 watts was observed with 3300
watts input power. The maximum slope efficiency at the
maximum available power of 3300 watts was measured as 0.19
percent, which is considerably lower than found in commercial
systems using elliptical cavities. The slope
efficiency increased with increase in the input power; this
was probably due to the change in the wavelength of the peak
emission from the lamps. The optimized output power was
greatest at the minimum resonator length of approximately
one half the mirror radius of curvature, and reached a
minimum at one radius of curvature spacing.
Type
Thesis
Description
Series/Report No
Department
Physics
Organization
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Approved for public release; distribution is unlimited.
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