Realization of simultaneous balanced multi-outputs for multi-protocols QKD decoding based on silica-based planar lightwave circuit

• 作者: Jin You Yue Wang Jun-Ming An
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: GENERAL
• 页码范围: 252-259
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/abe2ff

摘要

Silica-based planar lightwave circuit (PLC) devices can reduce transmission loss and cost in a quantum key distri-bution (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).