Ultralow noise up-conversion detector and spectrometer at telecom band

Date: 2013-06-04
Authors Guo-Liang Shentu, Jason S. Pelc, Xiao-Dong Wang, Qi-Chao Sun, Ming-Yang Zheng, M. M. Fejer, Qiang Zhang, Jian-Wei Pan
Journal No. Optics Express, 21, 13986, (2013)
Abstract Ultralow noise up-conversion single-photon detection for the 1550-nm telecommunications band is achieved using a PPLN waveguide, long wavelength pump, and narrowband filtering with a volume Bragg grating. The total-system detection efficiency reaches 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 better than liquid nitrogen cooled InGaAs array. The new detector can find immediate applications in quantum cryptography, quantum communication, Optical Time Domain Reflectometer(OTDR), photon counting lidar and etc.