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An ultra-sensitive pulsed balanced homodyne detector: Application to time-domain quantum measurements by Hansen, H.; Aichele, T.; Hettich, C.; Lodahl, P.; Lvovsky, A. I.; Mlynek, J.; Schiller, S. is a scholarly article available to read on EtoBox.

What is An ultra-sensitive pulsed balanced homodyne detector: Application to time-domain quantum measurements about?

A pulsed balanced homodyne detector has been developed for precise measurements of electric field quadratures of pulsed optical quantum states. A high level of common mode suppression (> 85 dB) and low electronic noise (730 electrons per pulse) provide a signal to noise ratio of 14 dB for the measurement of the quantum noise of individual pulses. Measurements at repetition rates up to 1 MHz are possible. As a test, quantum tomography of the coherent state is performed and the Wigner function and the density matrix are reconstructed with a 99.5% fidelity. The detection system can also be used for ultrasensitive balanced detection in cw mode, e.g. for weak absorption measurements.

Author

Hansen, H.; Aichele, T.; Hettich, C.; Lodahl, P.; Lvovsky, A. I.; Mlynek, J.; Schiller, S.

Published

2001

Language

EN