We have investigated the phase-sensitive deamplification response of a traveling-wave degenerate optical parametric amplifier that consists of a type II phase-matched KTP crystal pumped by the second harmonic of a Q-switched mode-locked Nd:YAG laser. Experimental results are in good agreement with the theory of an optical parametric amplifier in which the Gaussian-beam nature of the various fields along with the diffraction of the amplified signal beam is taken into account. Because of the phenomenon of gain-induced diffraction, maximum deamplification is limited to only ≃3 dB.
© 1994 Optical Society of America
Original Manuscript: August 23, 1993
Published: January 15, 1994
Chonghoon Kim, Ruo-Ding Li, and Prem Kumar, "Deamplification response of a traveling-wave phase-sensitive optical parametric amplifier," Opt. Lett. 19, 132-134 (1994)