Echelle gratings with low Polarization Dependent Loss (PDL)...

Details Echelle gratings with low Polarization Dependent Loss (PDL)... Echelle gratings with low Polarization Dependent Loss (PDL)...

2008-05-20

2008-05-20

Healy, Brian M (Department: 2883)

Optical waveguides

With optical coupler

Input/output coupler

C385S014000, C385S129000, C385S130000, C359S566000, C359S571000, C359S572000, C438S029000, C438S031000, C438S032000

Reexamination Certificate

active

07376305

ABSTRACT:
An Echelle grating has alternate first (1a) and second (1b) sets of facets (1). The first set of facets (1a) is operative to reflect incident light (4) for diffraction and the second set of facets (1b) extends between adjacent facets of the first set (1a). Only the first set of facets (1a) is metallized to enhance reflection. The second set of facets (1b) is left unmetallized. This configuration reduces polarization dependent loss (PDL).

REFERENCES:
patent: 3237508 (1966-03-01), Keller et al.
patent: 4715027 (1987-12-01), Mahapatra et al.
patent: 5937113 (1999-08-01), He et al.
patent: 5999318 (1999-12-01), Morton et al.
patent: 6400509 (2002-06-01), Sappey et al.
patent: 6449096 (2002-09-01), Fabiny et al.
patent: 6995910 (2006-02-01), Fabiny et al.
patent: 2006/0209411 (2006-09-01), Delage et al.
patent: WO 01/77738 (2001-10-01), None

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