Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2007-01-17
2009-12-29
Healy, Brian M. (Department: 2883)
Optical waveguides
With optical coupler
Input/output coupler
C385S027000, C385S028000, C385S029000, C385S038000, C385S125000, C385S126000, C385S127000, C385S128000, C398S040000, C398S041000, C398S042000, C398S043000
Reexamination Certificate
active
07639909
ABSTRACT:
The subject invention pertains to a method and apparatus for multiplexing in optical fiber communications. The subject invention relates to a method and apparatus for spatial domain modulation in optical wavelengths. In a specific embodiment, the subject invention relates to a spatial domain multiplexer (SDM) for use with an optical fiber. Preferably, the input channels coupled into the fiber optic cable include collimated laser beams. The techniques of the subject invention can be utilized with single mode and multi mode waveguide structures, for example, single mode and multi mode optical fibers. The subject invention is applicable to step index optical fiber and to graded index optical fiber. Applications of the subject technology can include secure data links, for example, which can modulate data such that if the data is intercepted, the data cannot be interpreted. The subject methods and apparatus can also be used in conjunction with other multiplexing techniques such as time-domain multiplexing.
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Grossman Barry
Murshid Syed
Narakorn Puntada
Florida Institute of Technology
Healy Brian M.
Lam Hung
Rosenblatt Joel I.
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