G - Physics
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B
88/97.5
G02B 6/28 (2006.01) G02B 6/14 (2006.01) G02B 6/30 (2006.01) G02B 6/34 (2006.01) G02F 1/01 (2006.01) G02F 1/1333 (2006.01) G02F 1/313 (2006.01)
Patent
CA 1273515
FROM 01 380 0810 86.12.24 13:29 - 11 - ABSTRACT An optical coupler device comprises a waveguide structure underlying a first layer of material which has a refractive index higher than the effective refractive index of the waveguide structure and which is capable of supporting propagation modes of a higher order than, but matching the phase velocity of, the propagation mode or modes in the underlying waveguide structure, said layer thereby forming a wave guiding structure.
526311
Brierley Michael Charles
Mallinson Stephen Robert
Millar Colin Anderson
British Telecommunications Public Limited Company
G. Ronald Bell & Associates
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