27 September 2016 Alignment and measurement for back-end optical system of quantum communication
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Proceedings Volume 9684, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment; 96841G (2016) https://doi.org/10.1117/12.2242142
Event: Eighth International Symposium on Advanced Optical Manufacturing and Testing Technology (AOMATT2016), 2016, Suzhou, China
Abstract
This paper introduced the method of alignment and measurement for back-end optical system of quantum communication ground station. The alignment methods of important components of system such as 20 constriction multiplicator, single photon detector mechanism and so on were introduced at first. The alignment method of the key receiving optical path and the entanglement receiving optical path which were integrated into coaxial multi optical path with other three optical paths were described in detail. Finally the back-end optical system was tested indoors with an optical power meter and a collimator. The results shows that the quantum key signal (@850nm) receiving efficiency is 27.6%, the average polarization contrast is better than 320:1, the receiving efficiency of quantum entanglement signal (@810nm) was 28.6%, and the average polarization contrast is better than 180:1.
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Qi-rui Xu, Qi-rui Xu, Bin Fan, Bin Fan, } "Alignment and measurement for back-end optical system of quantum communication", Proc. SPIE 9684, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 96841G (27 September 2016); doi: 10.1117/12.2242142; https://doi.org/10.1117/12.2242142
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