Device for the frequency transposition of optical signals

Details Device for the frequency transposition of optical signals Device for the frequency transposition of optical signals

1996-07-02

1999-12-14

Hofsass, Jeffery A.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359127, 359130, 359139, 359326, 385 24, H04B 1000

Patent

active

060025042

ABSTRACT:
A device for the frequency transposition of optical signals receiving data elements liable to be at different wavelengths (.lambda.0, .lambda.1 . . . .lambda.n) and capable of delivering, at output, these data elements at one of the reception wavelengths. The device comprises a circulator (30); at least one optical arm comprising a rejection filter (31) followed by a wavelength converter (32); the circulator comprising a port for the reception of the data packets at the different wavelengths (.lambda.0, .lambda.1 . . . .lambda.n), a port for the transmission of data packets without changing their wavelength and at least one other port for each optical arm, so that each of these ports is connected to a rejection filter (31) to receive the data packets at the different wavelengths and reintroduce the data packets reflected by this filter into the circulator; the converter (32) at output of each rejection filter enabling the conversion into a desired wavelength of the data packets not reflected by the filter. The invention can be applied to asynchronous packet or synchronous frame transmission packets.

REFERENCES:
patent: 5388001 (1995-02-01), Okayama et al.
patent: 5589967 (1996-12-01), Auffret
patent: 5619368 (1997-04-01), Swanson
patent: 5636301 (1997-06-01), O'Sullivan et al.
patent: 5654812 (1997-08-01), Suzuki
patent: 5701188 (1997-12-01), Shigematsu et al.
patent: 5748349 (1998-05-01), Mizrahi
patent: 5751456 (1998-05-01), Koonen
Lee et al.; Routing and Switching in a Wavelength Convertible Optical Network, IEEE INFORCOM '93, vol. 2, pp. 578-585.

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