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arXiv · 1902.06464

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
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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.

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Fei Ma, Long-Yue Liang, Jiu-Peng Chen, Yang Gao, Ming-Yang Zheng, Xiu-Ping Xie, Hong Liu, Qiang Zhang, Jian-Wei Pan. 2019-02-18. Up-conversion single-photon detectors based on integrated periodically poled lithium niobate waveguides. https://doi.org/10.1364/josab.35.002096

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