Abstract
Brillouin amplification is a form of two-beam coupling in which a signal beam is amplified by stimulated Brillouin scattering from a counterpropagating pump beam (Fig, 1). The two beams interact via an acoustic grating which is generated within the Brillouin medium. The beams have a frequency difference dose to the acoustic frequency, with the signal having a lower frequency than the pump, i.e., ωλ=ωγ−ωδ−δωf, where ωδ, is the acoustic frequency, and δω is a detuning from the center of the Brillouin gain curve.
© 1992 Optical Society of America
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