Optical protection switching system

Details Optical protection switching system Optical protection switching system

1996-12-31

1999-03-30

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Optical fiber

357134, 357187, 357194, 385 16, H01S 300, G02B 626, G02F 300

Patent

active

058896104

ABSTRACT:
An optical line protection switching system is realized by employing a plurality of rare earth-doped fiber optical amplifiers as gain-switched optical connections, for example gain-switched optical distributors, i.e., commutators, and/or gain-switched optical selectors in a gain switched optical line protection switching system. In one embodiment, at least one or more gain switched optical distributors are employed to realize so-called head-end switching of an incoming optical signal and one or more gain switched optical selectors are employed to realize so-called tail-end switching of the optical signal to form a 1.times.1 (1.times.N) optical line protection switching system. In another embodiment, an incoming optical signal is bridged to one or more optical paths, while the tail-end switching is realized by employing one or more gain-switched optical selectors to form a 1+1 (1+N) optical line protection switching system.

REFERENCES:
patent: 5181134 (1993-01-01), Fatehi et al.
patent: 5365368 (1994-11-01), Hsu et al.
patent: 5491581 (1996-02-01), Roba
patent: 5539657 (1996-07-01), Utsumi et al.
patent: 5623565 (1997-04-01), Blair et al.
patent: 5633961 (1997-05-01), Kirkby et al.
Pending Patent Application 08/579529, filed on Dec. 27, 1995, allowed on Nov. 4, 1997, Batch No. T79, by Mohammad T. Fatehi and Fred Ludwig Heismann, titled "Maintenance of Optical Networks".

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