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Realization of simultaneous balanced multi-outputs for multi-protocols QKD decoding based onsilica-based planar lightwave circuit |
| Jin You(游金)1,3, Yue Wang(王玥)1,†, and Jun-Ming An(安俊明)1,2,3 |
1 State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
3 College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Silica-based planar lightwave circuit (PLC) devices can reduce transmission loss and cost in a quantum key distribution (QKD) system, and have potential applications in integration and production. A PLC-based quantum decoding integrated chip for multi-protocols is designed and fabricated, which is composed of variable optical splitters (VOSs), asymmetric Mach-Zehnder interferometers (AMZIs), and variable directional couplers (VDCs). Balanced pulse-pairs of four outputs are obtained simultaneously with measured delay times of 405 ps and 402 ps, respectively. The chip has advantages in achieving high interference visibility and low quantum bit error rate (QBER).
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Received: 11 December 2020
Revised: 16 January 2021
Accepted manuscript online: 04 February 2021
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PACS:
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03.67.Hk
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(Quantum communication)
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| Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2018YFA0306403) and the National Nature Science Foundation of China (Grant No. 61805232). |
Corresponding Authors:
Yue Wang
E-mail: wy1022@semi.ac.cn
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Cite this article:
Jin You(游金), Yue Wang(王玥), and Jun-Ming An(安俊明) Realization of simultaneous balanced multi-outputs for multi-protocols QKD decoding based onsilica-based planar lightwave circuit 2021 Chin. Phys. B 30 080302
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