Room temperature photon number resolving detector at telecom wavelengths

Details Room temperature photon number resolving detector at telecom wavelengths Room temperature photon number resolving detector at telecom wavelengths

2010-03-29

arxiv.org/abs/1003.5579v1

Physics

Quantum Physics

Scientific paper

Large dynamic range room temperature photon number resolving (PNR) detectors can be very useful for measuring very low light intensities and for analyzing multiphoton quantum states. In this paper we present a PNR detector based on the up-conversion (UC) of telecom signal into visible wavelength and on its detection by a thermoelectrically cooled multi-pixel silicon avalanche photodiodode (APD), also known as Silicon Photon Multiplier (SiPM). An efficiency of 4% is attained and the poissonian statistics of input coherent states is maintained up to approximately 20 simultaneous detections. The cross-talk effects on the detected signal are estimated in order to properly calibrate the detector. This scheme can be used at arbitrary wavelengths above the visible spectral window with appropriate up-conversion.

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