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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 26, Iss. 21 — Nov. 1, 2001
  • pp: 1714–1716

Ultrasensitive pulsed, balanced homodyne detector: application to time-domain quantum measurements

H. Hansen, T. Aichele, C. Hettich, P. Lodahl, A. I. Lvovsky, J. Mlynek, and S. Schiller  »View Author Affiliations


Optics Letters, Vol. 26, Issue 21, pp. 1714-1716 (2001)
http://dx.doi.org/10.1364/OL.26.001714


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Abstract

A pulsed, balanced homodyne detector has been developed for precise measurement of the 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 measurement of the quantum noise of individual pulses. Measurements at repetition rates as high as 1 MHz are possible. As a test, quantum tomography of the coherent state was performed, and the Wigner function and the density matrix were reconstructed with 99.5% fidelity. The detection system can be used for ultrarsensitive balanced detection in cw mode, e.g., for weak absorption measurements.

© 2001 Optical Society of America

OCIS Codes
(270.5290) Quantum optics : Photon statistics
(270.5570) Quantum optics : Quantum detectors

Citation
H. Hansen, T. Aichele, C. Hettich, P. Lodahl, A. I. Lvovsky, J. Mlynek, and S. Schiller, "Ultrasensitive pulsed, balanced homodyne detector: application to time-domain quantum measurements," Opt. Lett. 26, 1714-1716 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-21-1714

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