Laser mode selection by internal reflection prisms.
Internal reflection prisms were used to produce a narrow angular range of high reflectivity within a laser cavity. The selectivity was obtained from the sharp angular variation of internal reflectivity near the critical angle. Angular mode selection of a Nd: glass normal laser was achieved by this critical internal reflection (CIR) technique. Two-dimensional angular mode selection was observed with two orthogonal Lummer-Gehrcke plates within the laser cavity.
Deshazer
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Aerospace Group, Hughes Aircraft Company, Culver City, California 90230, USA.
Maunders
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