Homodyne measurement of average photon number

Details Homodyne measurement of average photon number Homodyne measurement of average photon number

2005-09-20

arxiv.org/abs/quant-ph/0509128v2

Physics

Quantum Physics

6 pages, 6 figures. Submitted to Phys. Rev. A. Only this 'comments:' field changed from last submission

Scientific paper

10.1103/PhysRevA.73.033808

We describe a new scheme for the measurement of mean photon flux at an arbitrary optical sideband frequency using homodyne detection. Experimental implementation of the technique requires an AOM in addition to the homodyne detector, and does not require phase locking. The technique exhibits polarisation, frequency and spatial mode selectivity, as well as much improved speed, resolution and dynamic range when compared to linear photodetectors and avalanche photo diodes (APDs), with potential application to quantum state tomography and information encoding using an optical frequency basis. Experimental data also directly confirms the Quantum Mechanical description of vacuum noise.

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