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A simple method for the production of a polarized Nd:Y/sub 3/Al/sub 5/0/sub 12/ on Y/sub 3/Al/sub 5/O/sub 12/ planar waveguide laser is reported. A 50-nm layer of Au deposited on the surface of an unclad, 8.3-/spl mu/m thick core region has produced an improvement in the TE/TM polarization extinction ratio from 7 to 27 dB. The M/sup 2/ of the beam in the guided plane has been reduced from 1.53/spl plusmn/0.01 in an uncoated region of the waveguide to 1.17/spl plusmn/0.01 in the Au-coated region using optimum pump launch conditions.
Date of Publication: Oct. 1998