P.D. Drummond, S.J. Carter, et al.
Optics Letters
A monolithic doubly resonant optical parametric oscillator produced signal and idler modes at widely separated wavelengths whose amplitude fluctuations were correlated (53.6 1.0)% below the vacuum-noise level. The system was used to detect modulated signals well below the shot-noise limit. © 1990 The American Physical Society.
P.D. Drummond, S.J. Carter, et al.
Optics Letters
R.M. Macfarlane, R.M. Shelby
Optics Communications
R.M. Shelby, D.A. Waldman, et al.
CLEO 2000
R.M. Macfarlane, R.M. Shelby, et al.
Optics Letters