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http://dx.doi.org/10.3807/KJOP.2011.22.5.223

Single-photon Detection at 1.5 ㎛ Telecommunication Wavelengths Using a Frequency up-conversion Detector  

Kim, Heon-Oh (Department of Physics & Basic Science Research Institute, University of Ulsan)
Youn, Chun-Ju (The Convergence Components & Materials Research Laboratory, Electronics and Telecommunication Research Institute)
Cho, Seok-Beom (Fusion Technology T&D Team, Corporate R&D Center, SK Telecom)
Kim, Yong-Soo (Department of Physics & Basic Science Research Institute, University of Ulsan)
Publication Information
Korean Journal of Optics and Photonics / v.22, no.5, 2011 , pp. 223-229 More about this Journal
Abstract
We present a low jitter frequency up-conversion detector based on quasi-phase matched sum frequency generation in a periodically poled $LiNbO_3$ waveguide for efficient single-photon detection at 1.5 ${\mu}m$ telecommunication wavelengths. The maximum detection efficiency and the noise count rate using the pump power of 300 mW and the pump wavelength of 974 nm are about 7% and 480 kHz, respectively. We also characterize the timing jitter of the frequency up-conversion detector by analyzing the time distribution of the detection outputs for photons generated through a picosecond pump pulsed spontaneous parametric downconversion. The minimum timing jitter was measured to be about 39.1 ps. Coincidence measurement with a narrow time window for pulsed up-conversion photons can eliminate the unwanted noise counts and maximize signal to noise ratio.
Keywords
Quasi-phase matching; Frequency up-conversion; Single photon detector; Timing jitter;
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