Multimode planar waveguide spectral filter

Details Multimode planar waveguide spectral filter Multimode planar waveguide spectral filter

2006-01-17

2006-01-17

Palmer, Phan T. H. (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S003000, C385S010000, C385S014000, C359S565000, C359S569000

Reexamination Certificate

active

06987911

ABSTRACT:
A spectral filter comprises a planar optical waveguide having at least one set of diffractive elements. The waveguide confines in one transverse dimension an optical signal propagating in two other dimensions therein. The waveguide supports multiple transverse modes. Each diffractive element set routes, between input and output ports, a diffracted portion of the optical signal propagating in the planar waveguide and diffracted by the diffractive elements. The diffracted portion of the optical signal reaches the output port as a superposition of multiple transverse modes. A multimode optical source may launch the optical signal into the planar waveguide, through the corresponding input optical port, as a superposition of multiple transverse modes. A multimode output waveguide may receive, through the output port, the diffracted portion of the optical signal. Multiple diffractive element sets may route corresponding diffracted portions of optical signal between one or more corresponding input and output ports.

REFERENCES:
patent: 6678429 (2004-01-01), Mossberg et al.
patent: 6829417 (2004-12-01), Greiner et al.
patent: 6879441 (2005-04-01), Mossberg

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