We demonstrate up-conversion single-photon detection for the 1550-nm telecommunications band using a PPLN waveguide, long-wavelength pump, and narrowband filtering using a volume Bragg grating. We achieve total-system detection efficiency of around 30% with noise at the dark-count level of a Silicon APD. Based on the new detector, a single-pixel up-conversion infrared spectrometer with a noise equivalent power of −142 dBm Hz-1/2 was demonstrated, which was as good as a liquid nitrogen cooled CCD camera.
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shentu_opex_2013.pdf | 1.03 MB |