An optical parametric amplifier (OPA) has been demonstrated in bulk, periodically poled lithium niobate and is shown to operate with a noise figure well below the classical limit. In contrast to conventional OPA's, this device uses quasi-phase matching to provide the coupling between the pump and the signal. Comparison of the measured performance with that of a theoretical model reveals that the main intrinsic contribution to the output noise is due to spatial and temporal mode mixing, which arises as a consequence of tight focusing of the incident beams. Factors that affect the performance of this amplifier are identified theoretically and their relative importance investigated for both amplification and squeezing.
© 1996 Optical Society of AmericaFull Article | PDF Article
K. Bencheikh, E. Huntziger, and J. A. Levenson
J. Opt. Soc. Am. B 12(5) 847-852 (1995)
Matthew E. Anderson, D. F. McAlister, M. G. Raymer, and Mool C. Gupta
J. Opt. Soc. Am. B 14(11) 3180-3190 (1997)
Katia Gallo and Gaetano Assanto
J. Opt. Soc. Am. B 16(5) 741-753 (1999)