8 April 1988 Angular Compensation For Multiline Dispersion In Raman Amplifiers
Author Affiliations +
Proceedings Volume 0874, Nonlinear Optical Beam Manipulation, Beam Combining, and Atmospheric Propagation; (1988); doi: 10.1117/12.943825
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States
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.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J A Goldstone, Bradley Bobbs, Michael M Johnson, "Angular Compensation For Multiline Dispersion In Raman Amplifiers", Proc. SPIE 0874, Nonlinear Optical Beam Manipulation, Beam Combining, and Atmospheric Propagation, (8 April 1988); doi: 10.1117/12.943825; https://doi.org/10.1117/12.943825

Raman spectroscopy


Phase matching

Four wave mixing



Atmospheric propagation


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