We investigate the process of Brillouin amplification when the pump beam has a TEM<sub>00</sub> Gaussian spatial profile. We show that the fidelity of amplification is a function of the ratio of the signal-beam diameter to the pump-beam diameter, the signal-beam intensity, and the small-signal gain of the Brillouin amplifier. We have verified these results experimentally by amplifying weak 1.06-μ m laser pulses in CCl<sub>2</sub>FCClF<sub>2</sub>.
© 1991 Optical Society of America
K. D. Ridley, D. C. Jones, G. Cook, and A. M. Scott, "Brillouin amplification with a Gaussian pump beam," J. Opt. Soc. Am. B 8, 2453-2458 (1991)