Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2006-02-21
2006-02-21
Ullah, Akm Enayet (Department: 2874)
Optical waveguides
With optical coupler
Plural
C398S043000, C398S048000
Reexamination Certificate
active
07003194
ABSTRACT:
An optical multiplexer and demultiplexer (mux-demux) (100) comprises a multimode waveguide (126) which communicates with first (122) and second (124) coupling waveguides. Multiplexed optical radiation comprising individual wavelength channels of appropriate wavelength introduced into the input waveguide is demultiplexed by means of modal dispersion and in-ter-modal interference with the multimode waveguide. The mux-demux consists of merely of waveguides and is therefore simple to fabricate and integrate with other components in integrated optical systems, and is capable of resolving channels having a small (˜1 nm) wavelength spacing. The mux-demux may be used without modification as a demultiplexer and remains of simple construction when scaled up to operate with many channels.
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Search Report from the GB Patent Office for Application No. GB 0125290.0.
McDonnell Boehnen & Hulbert & Berghoff LLP
Qinetiq Limited
Ullah Akm Enayet
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