Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1994-06-09
1996-01-30
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Optical fiber
359134, 359160, 359345, 385 28, 385 39, 385124, 372 6, H01S 3098
Patent
active
054885060
ABSTRACT:
The present invention is directed at an all-fiber amplifier and laser which use an active multimode graded index fiber. In the amplifier, the active fiber is a multimode graded-index fiber having an axis and a length L. The length L is longer than the distance an input beam (from an input fiber) requires to relax into a stationary state of propagation along the axis of the active fiber. The active fiber is optically connected to an input and output fibers such that the input beam couples to the active fiber at a certain distance from the axis and that the axis of the output fiber coincides with the axis of active fiber. In a laser configuration, the active fiber has a complex gradient parameter g described by the gradient function:
REFERENCES:
patent: 4815079 (1989-03-01), Switzer et al.
Giles et al., SPIE vol. 1789, Fiber Laser Sources and Amplifiers IV, 1992, pp. 137-139.
Mironou et al, Lau. J. Quent. Elct. vol. 8, #6, pp. 705-708, Jun. 1978; abst. only provided.
Stearns et al, J. of Lightwave Tech., vol. LT-2, #4, Aug. 1984, pp. 358-362.
Dubois et al, Opt. Lett., vol. 19, #7, pp. 433-435, Apr. 1, 1994; abst. only herewith.
Krisvoshlykov Sergej G.
Neuberger Wolfgang
CeramOptec Industries Inc.
Moskowitz Nelson
Skutnik Bolesh J.
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