Rectangular-passband multiplexer

Details Rectangular-passband multiplexer Rectangular-passband multiplexer

2005-10-18

2008-10-07

Pak, Sung H (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S031000, C385S037000

Reexamination Certificate

active

07433560

ABSTRACT:
A low-loss rectangular-passband multiplexer including a three-arm interferometer coherently connected to a waveguide grating router (WGR), resulting in a passband substantially of type N=3, without intrinsic loss. The three-arm interferometer has a free-spectral range (FSR) substantially equal to the channel spacing and is connected to an M-arm interferometer having a much larger FSR. The three-arm interferometer includes three waveguides each exhibiting a linearly increasing path length optically connected to a 1×3 coupler and a 3×3 coupler. The 1×3 coupler may be constructed from a series of Y-branch couplers.

REFERENCES:
patent: 5162869 (1992-11-01), Michel et al.
patent: 5488680 (1996-01-01), Dragone
patent: 5862279 (1999-01-01), Amersfoort et al.
patent: 6289147 (2001-09-01), Bulthuis et al.
patent: 6421478 (2002-07-01), Paiam
patent: 6587615 (2003-07-01), Paiam

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