Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2006-10-19
2008-11-04
Doan, Jennifer (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S015000, C385S031000
Reexamination Certificate
active
07447403
ABSTRACT:
An integrated etched multilayer grating-based wavelength multiplexer/demultiplexer is disclosed wherein an etched multilayer grating structure is monolithically integrated within the optical waveguide stack of the multiplexer/demultiplexer to reflectively diffract an input optical beam. The multilayer grating structure is generally comprised of a series of etched diffractive elements and an etched multilayer reflector, the combined optical response of which providing the desired multiplexing/demultiplexing effect. The etched structures are generally comprised of shallow etch structures in a top surface of the multiplexer/demultiplexer waveguide stack. Monolithically integrated input and output ridge waveguides may also be provided, optionally fabricated in a same etching step as the etched multilayer grating.
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V. Tolstikhin et al “Monolithically Integrated Optical Channel Monitor for DWDM Transmission Systems”Journal of Lightwave Technology, vol. 22, No. 1, pp. 146-153, 2004.
Bisaillon Eric
Kirk Andrew G
Doan Jennifer
Freedman & Associates
McGill University
Weir Mark Robert
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