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20 November 1985 Increasing The Efficiency Of Stimulated Scattering Phase-Conjugate Mirrors
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Proceedings Volume 0540, Southwest Conf on Optics '85; (1985)
Event: 1985 Albuquerque Conferences on Optics, 1985, Albuquerque, United States
Stimulated processes, such as Brillouin and Raman Scattering (SBS and SRS), have been used successfully for high power phase conjugation. To achieve high conversion efficiency, usually the intensity of the laser beam needs to be relatively high. We show that SBS or SRS reflectance can be substantially increased by feeding back a portion of the back scattered Stokes energy. Before the feedback Stokes wave is admitted through the exit window of the Brillouin cell, it is strongly diffused by a diffusing plate. This is necessary since the feedback Stokes wave is the phase conjugate of the laser field at the entrance window but not the exit window. The phase conjugate component in the diffused Stokes wave will increase the efficiency of the process dramatically. We show that if losses are neglected, the energy reflection coefficient, R, can achieve a value R = 1 - β, where β is the feedback energy fraction of the Stokes wave. Since can be small compared to unity, in principle, R can be close to unity.
© (1985) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sami A. Shakir "Increasing The Efficiency Of Stimulated Scattering Phase-Conjugate Mirrors", Proc. SPIE 0540, Southwest Conf on Optics '85, (20 November 1985);

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