Fiber Bragg grating element

Details Fiber Bragg grating element Fiber Bragg grating element

2006-02-16

2010-11-16

Le, Uyen-Chau N (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S039000

Reexamination Certificate

active

07835604

ABSTRACT:
The present invention provides a fiber Bragg grating element which is simply configured and capable of obtaining a high cut-off amount exceeding 40 dB in a wide range. A fiber Bragg grating element of the present invention has a plurality of gratings formed in an optical waveguide having a core and a cladding around the core thereby to perform high rejection filtering on an input optical signal over a desired bandwidth˜ the gratings being formed with a grating pitch between adjacent two of the gratings increasing toward a center in a longitudinal direction of the optical waveguide.

REFERENCES:
patent: 6999659 (2006-02-01), Nowak et al.
patent: 2003/0142912 (2003-07-01), Sakamoto et al.
patent: 7 244209 (1995-09-01), None
patent: 07-244209 (1995-09-01), None
patent: 2002 328238 (2002-11-01), None

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