Efficient phase conjugation under parametric-feedback conditions
Abstract
A feedback was produced by means of a parametrically excited Stokes wave in order to achieve phase conjugation through the excitation of stimulated Brillouin scattering under generation conditions. A spatially inhomogeneous pump beam propagating through a nonlinear medium was returned by mirrors while a phase conjugate of the pump beam, a stimulated Brillouin scattering beam, propagated on the same path and in the opposite direction. A parametrically excited Stokes beam was then reflected back into a cell to create a feedback. A theoretical model is presented for the configuration with a rectangular waveguide. It is shown that the parametric interaction between the two sets of beams arises from phase matching of the phonon waves with wave vectors. The model was compared with experimental data, demonstrating that the angular divergence of the stimulated Brillouin beam matched the divergence of the pump beam.
- Publication:
-
ZhETF Pisma Redaktsiiu
- Pub Date:
- October 1982
- Bibcode:
- 1982ZhPmR..36..281O
- Keywords:
-
- Brillouin Effect;
- Feedback;
- Laser Pumping;
- Mathematical Models;
- Phase Conjugation;
- Ruby Lasers;
- Lasing;
- Phase Matching;
- Stokes Law Of Radiation;
- Waveguides;
- Lasers and Masers