16 research outputs found
Experimental multi-photon-resolving detector using a single avalanche photodiode
A multichannel detector has been constructed using a single avalanche
photodiode and a fiber-loop delay line. Detection probabilities of the channels
can be set using a variable-ratio coupler. The performance of the detector is
demonstrated on its capability to distinguish multi-photon states (containing
two or more photons) from the one-photon state and the vacuum state.Comment: LATEX, 11 pages, 5 PostScript figure
Absolute calibration of photon-number-resolving detectors with an analog output using twin beams
A method for absolute calibration of a photon-number resolving detector
producing analog signals as the output is developed using a twin beam. The
method gives both analog-to-digital conversion parameters and quantum detection
efficiency for the photon fields. Characteristics of the used twin beam are
also obtained. A simplified variant of the method applicable to fields with
high signal to noise ratios and suitable for more intense twin beams is
suggested.Comment: 4 pages, 3 figure