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25 April 2024

» arxiv » 1902.6464

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Up-conversion single-photon detectors based on integrated periodically poled lithium niobate waveguides
Fei Ma ; Long-Yue Liang ; Jiu-Peng Chen ; Yang Gao ; Ming-Yang Zheng ; Xiu-Ping Xie ; Hong Liu ; Qiang Zhang ; Jian-Wei Pan ;
Date:	18 Feb 2019
Abstract:	We demonstrate up-conversion single-photon detectors based on integrated periodically poled lithium niobate waveguides, which incorporate two mode filters and a directional coupler. The two mode filters are optimized for the fiber-waveguide coupling efficiencies for 1550 nm and 1950 nm respectively while the directional coupler plays the role of wavelength combiner, making the overall system portable and low-cost. The two wavelengths pump each other in our detection system. We achieve detection efficiencies of 28% for 1550 nm and 27% for 1950 nm, respectively. This scheme provides an efficient integrated single-photon detection method for any two well-separated spectral bands in the whole low-loss range of lithium niobate waveguides.
Source:	arXiv, 1902.6464
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