Abstract

Simple coupled-wave theory^1,2 accounts for depletion of the pump beam due to energy transfer (i.e., amplification) to the probe beam. Ignoring absorption, the probe gain g can be expressed as¹ where I₁(0) is the incident probe intensity, Γ is the two-beam-coupling coefficient and r_pp is the incident pump-to-probe beam ratio given by (2) with I₂(0) being the incident pump intensity.

© 1991 Optical Society of America