Intensity averaging and four-wave mixing in Raman amplifiers
Abstract
A model is presented which allows a quantitative estimate of the quality of pump beam intensity averaging in a Raman amplifier or related devices. The model also demonstrates the effect of finite pump correlation length in four-wave mixing processes. Experimental measurements on a methane Raman amplifier pumped at 248 nm are found to be in good agreement with the model. It is also shown that the intensity of secondary waves due to interactions between components of a single pump beam are proportional to 1/N, where N is the number of pump beams, and can therefore always be controlled by increasing the number of pump beams.
- Publication:
-
IEEE Journal of Quantum Electronics
- Pub Date:
- March 1982
- DOI:
- 10.1109/JQE.1982.1071540
- Bibcode:
- 1982IJQE...18..399G
- Keywords:
-
- Beam Interactions;
- Laser Pumping;
- Lasing;
- Raman Lasers;
- Signal Mixing;
- Stokes Law Of Radiation;
- Krypton Fluoride Lasers;
- Laser Outputs;
- Mirrors;
- Phase Conjugation;
- S Waves;
- Wave Interaction;
- Lasers and Masers