We use a stable, 5 dB, amplitude squeezed source for a quantum nondomolition (QND) experiment. The performance of our QND system is enhanced by an electro-optic feedforward loop which improve,, the signal transfer efficiency. At best, we measure a total signal transfer of 1.81 and conditional variance of 0.55.
Bibliographical noteCopyright (2002) American Physical Society
- OPTICAL TAP
- BEAM SPLITTER
- ELECTROOPTIC FEEDFORWARD
- BACKACTION EVADING MEASUREMENTS
- EXPERIMENTAL REALIZATION