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Proceedings Paper

Angular Compensation For Multiline Dispersion In Raman Amplifiers
Author(s): J A Goldstone; Bradley Bobbs; Michael M Johnson
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Paper Abstract

In a Raman amplifier pumped by a multiline laser, it is well-known that dispersion in the Raman medium may decouple the Raman gains of the lines from each other. The small-signal gain of each line is then reduced by the fraction of the total pump power in each line. If these gains are very different from each other, then the overall conversion efficiency to the Stokes-shifted output may be limited by the difficulty in optimizing the amplifier cell length for all lines simultaneously. We describe here how the gains may be completely coupled together to solve these problems by adjusting the relative angles between the input beams so as to compensate for medium dispersion, and thereby eliminate the four-wave mixing phase mismatch. The theoretical basis for the effect, different geometries for achieving coupling, and computer simulation results for sample cases are presented.

Paper Details

Date Published: 8 April 1988
PDF: 4 pages
Proc. SPIE 0874, Nonlinear Optical Beam Manipulation, Beam Combining, and Atmospheric Propagation, (8 April 1988); doi: 10.1117/12.943825
Show Author Affiliations
J A Goldstone, Rockwell International Corporation (United States)
Bradley Bobbs, Rockwell International Corporation (United States)
Michael M Johnson, Rockwell International Corporation (United States)

Published in SPIE Proceedings Vol. 0874:
Nonlinear Optical Beam Manipulation, Beam Combining, and Atmospheric Propagation
Robert A. Fisher, Editor(s)

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