Optical switch arrangement with synchronisation feature and in p

Details Optical switch arrangement with synchronisation feature and in p Optical switch arrangement with synchronisation feature and in p

1997-02-14

1999-11-02

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359117, 359128, 359139, H04J 1408, H04J 1402, H04B 1012

Patent

active

059781203

ABSTRACT:
The optical switch arrangement is included in an optical node of an optical network and includes an optical switch (OS) with optical inputs and optical outputs which routes incoming optical signals from the optical inputs to the optical outputs and generates outgoing optical signals. The optical switch arrangement (OSA) additionally includes an optical delay device (ODD) with optical delay units (ODU1, . . . , ODUm) coupled to a subset of the optical outputs and which delays an outgoing optical signal with a predetermined delay time to generate a delayed optical signal and a control unit (CTRL) to control the routing and the predetermined delay time. The optical switch arrangement (OSA) is thereby enabled to synchronise incoming optical signals. The arrangement is used in an optical protection switching module consisting of the connection of this optical switch arrangement (OSA) and a plurality of optical selectors which select one out of the outgoing optical signals or the delayed optical signals. A second use of the arrangement relates to an optical hitless protection switching module (OHPSW) similar to the previous module but where the optical selectors select one out of a plurality of synchronised outgoing optical signals.

REFERENCES:
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patent: 5469284 (1995-11-01), Haas
patent: 5471332 (1995-11-01), Shiragaki et al.
patent: 5734486 (1998-03-01), Guilemot
"Transparent routing: the enabling factor towards all -optical networking", by A. Fioretti et al form Alcatel Alsthom Recherche France, ECOC 1994 Florence, Italy, Sept. 1994, pps. 504,509.

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