Broadcasting arrayed waveguide

Details Broadcasting arrayed waveguide Broadcasting arrayed waveguide

2008-01-23

2009-12-29

Petkovsek, Daniel (Department: 2874)

Optical waveguides

With optical coupler

Plural

C385S037000, C398S068000

Reexamination Certificate

active

07639908

ABSTRACT:
The invention is a data transmission device that includes: an input Free Propagation Region (FPR) receiving a multi-wavelength signal and a single-wavelength signal, and two sets of arrayed waveguides coupled to the input FPR to carry the multi-wavelength signal and the single-wavelength signal, respectively. The arrayed waveguides demultiplex the multi-wavelength signal and create copies of the single-wavelength signal. The output plane of an output FPR receives the demultiplexed wavelengths and the copies of the single-wavelength signal such that one of the demultiplexed wavelengths and one of the copies of the single-wavelength signal focus onto the same position on the output plane. The device allows data (e.g., video stream) to be broadcast to all subscribers in a Wavelength-Division-Multiplexed Passive Optical Network (WDM-PON) architecture. A multicasting apparatus can be implemented by using a plurality of these devices and using different wavelengths for the single-wavelength signal for the different devices.

REFERENCES:
patent: 5440416 (1995-08-01), Cohen et al.
patent: 5546483 (1996-08-01), Inoue et al.
patent: 5926298 (1999-07-01), Li
patent: 6049640 (2000-04-01), Doerr
patent: 6381383 (2002-04-01), Bernasconi et al.
patent: 6516119 (2003-02-01), Menezo et al.
patent: 6678446 (2004-01-01), McGreer et al.

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