G - Physics – 01 – C
Patent
G - Physics
01
C
345/10
G01C 19/64 (2006.01) G01C 19/66 (2006.01) G01P 3/36 (2006.01) H01S 3/08 (2006.01)
Patent
CA 1201190
MODE DISCRIMINATION APPARATUS Abstract In an optical system such as a ring laser gyroscope cavity, oscillations occur in many transverse modes. The desired modes are allowed to exist by suppressing undesired modes utilyzing a light stop apparatus. One light stop is made by treating a dielectric mirror with an electron beam causing a phase change to occur to the undesired reflected waves. An alternative light stop is made by depositing an absorptive material on a dielectric mirror for absorbing some of the energy of the undesired modes. Both light stop embodiments are adjustable with respect to a laser wave in a resonant cavity.
401273
Braun Kenneth H.
Perlmutter Michael S.
Raytheon Company
Smart & Biggar
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