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@inproceedings{Crofts:1990,
author = {Crofts, GJ and Wong, GKN and Damzen, MJ},
pages = {282--283},
title = {Stimulated Brillouin scattering with optical feedback: An enhanced phase conjugator with wide operational power range},
year = {1990}
}

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TY - CPAPER
AB - The use of optical feedback to reduce significantly the threshold power requirement, increase reflectivity, and improve the pulse conjugate fidelity of the stimulated Brillouin scattering (SOS) process is reported. Optical feedback is accomplished by taking the throughput of the pump beam from the SBS cell and redirecting it to overlap with the main pump input at a small angle. The feedback of the pump enhances the acoustic wave generation, and the Stokes radiation retracing the feedback path acts as a seeding signal. The Stokes radiation is generated by a Brillouin four-wave mixing process and provides a signal that is stronger and more correlated to the pump than the spontaneous noise would be. The consequence is a significant enhancement of the SBS process leading to a reduction in threshold power and high reflectivity, particularly for the conjugate part of the signal. The improvement in phase conjugate fidelity (PCF) was assessed for a pulsed frequency-doubled Nd:YAG laser system. Throughout most of the input energy range the PCF was >85% with feedback. When the feedback arm was blocked a significant reduction in fidelity was observed. In this experiment, at the highest powers used, the feedback/SBS reflectivity was 90%, at which time the PCF was approximately 90%.
AU - Crofts,GJ
AU - Wong,GKN
AU - Damzen,MJ
EP - 283
PY - 1990///
SP - 282
TI - Stimulated Brillouin scattering with optical feedback: An enhanced phase conjugator with wide operational power range
ER -

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