Abstract
We use a stable, 5 dB, amplitude squeezed source for a quantum nondemolition (QND) experiment. The performance of our QND system is enhanced by an electro-optic feedforward loop which improves the signal transfer efficiency. At best, we measure a total signal transfer of 1.81 and conditional variance of 0.55.
- Received 29 August 2001
DOI:https://doi.org/10.1103/PhysRevA.65.011803
©2001 American Physical Society