We study the spatial distribution of quantum noise in singly resonant second-harmonic generation. Calculations are performed below threshold for spatial modulational instability. For parameters for which the intracavity fields are modulationally stable the spatial spectrum shows maximum squeezing at k=0, whereas under conditions of modulational instability we find maximum squeezing at finite wave number |k|=kc, where kc corresponds to the classical critical wave number.
© 2002 Optical Society of America
(190.0190) Nonlinear optics : Nonlinear optics
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(270.0270) Quantum optics : Quantum optics
(270.6570) Quantum optics : Squeezed states
P. Lodahl and M. Saffman, "Spatial quantum noise in singly resonant second-harmonic generation," Opt. Lett. 27, 110-112 (2002)