Double diffraction grating with flat passband output

Details Double diffraction grating with flat passband output Double diffraction grating with flat passband output

2006-12-12

2006-12-12

Healy, Brian M. (Department: 2883)

Optical waveguides

With optical coupler

Input/output coupler

C385S014000, C385S129000, C385S130000, C385S046000, C398S082000, C398S084000, C398S087000

Reexamination Certificate

active

07149387

ABSTRACT:
The invention relates to a double-grating subtractive-dispersion optical channel multiplexer/demultiplexer for combining or separating optical channels and providing the output channels with a flat-top response. The FSR of the first grating is substantially equal to the channel spacing of the optical channels, such that the emission from the first grating achieves a cyclic offset of incidence angle into the second grating of the system.

REFERENCES:
patent: 6049644 (2000-04-01), Dragone
patent: 6111996 (2000-08-01), Thompson
patent: 6188818 (2001-02-01), Han et al.
patent: 6243514 (2001-06-01), Thompson
patent: 6298186 (2001-10-01), He
patent: 6754413 (2004-06-01), Bacque et al.
patent: 2005/0213886 (2005-09-01), Balakrishnan et al.

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