Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
1991-12-05
2001-02-06
Moskowitz, Nelson (Department: 3662)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C359S349000, C359S629000, C372S070000
Reexamination Certificate
active
06185024
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a laser multiplexing system and more particularly to a system whereby pulse signals can be delivered reliably from a plurality of lasers to a plurality of power-receiving devices.
In applications where a plurality of power-receiving devices are operated by pulse signals from more than one power-delivering laser such as copper lasers, it is important that these pulse signals are sure to be received by all of the target power-receiving devices even if some of the power-delivering lasers have failed. This is particularly true where the operations of these devices are mutually dependent such that a failure of one device to receive an intended pulse signal leads to a failure of a larger system to which others of these devices may belong.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to provide a laser multiplexing system whereby pulse signals from a plurality of power-delivering lasers can be dependably delivered to a target system containing a plurality of power-receiving devices.
Additional objects, advantages and novel features of the invention will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
To achieve the foregoing and other objects and in accordance with the purpose of the present invention, as embodied and broadly described herein, the laser multiplexing system of this invention may comprise a plurality of radiant power sources such as copper lasers and an equal number of fiber injection assemblies for receiving power and injecting the received power into a plurality of power-transmitting fibers for delivering the received power individually to a plurality of power-receiving devices such as dye laser amplifiers. In one embodiment, the copper lasers and the fiber injection assemblies are divided into groups each containing two of the copper lasers and two of the fiber injection assemblies. In each group, the two copper lasers and the two fiber injection assemblies are so arranged together with a beam splitter that the beam from each of the two copper lasers is in part transmitted through and in part reflected by the beam splitter and is received by both of the fiber injection assemblies. The power-transmitting fibers from each of the groups are so arranged as to deliver power to each of the power-receiving devices of the target system such that, even if a few of the copper lasers and/or fibers fail, the power supplied to any of the power-receiving devices will not completely drop to zero but will drop by the same proportionate amount. This is the feature of full redundancy.
In another embodiment, the laser multiplexing system is configured without a beam splitter. Full redundancy can still be obtained without pairing in groups of two the plurality of radiant power sources, such as copper lasers, with the fiber injection assemblies.
REFERENCES:
patent: 4860279 (1989-08-01), Falk et al.
patent: 4882775 (1989-11-01), Coleman
patent: 5039190 (1991-08-01), Blonder
patent: 5109447 (1992-04-01), Chan
patent: 5200964 (1993-04-01), Huber
Becker et al, IEEE Photonics Technology Letters, Sep. 1989; #9, pp. 267-269.
English, Jr. Ronald Edward
Johnson Steve A.
White Ronald K.
Moskowitz Nelson
Townsend and Townsend and Crew
United States Enrichment Corporation
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