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量子密码术的密码安全性由量子力学的基本原理保证而不依赖于计算复杂性 ,是极具应用前景的交叉学科 ,如何建立廉价高效的量子信道是量子密码术走向实用的关键问题之一。由于电信系统中使用的WDM不能满足量子信道的使用要求 ,本文首先提出了用复合波分复用器法在普通电信光缆上搭载量子密钥信道的方法 ,并用实验证明其可行性。
The cryptographic security of quantum cryptography is guaranteed by the basic principles of quantum mechanics without depending on computational complexity and is an interdisciplinary field with great application prospects. How to establish a low-cost and efficient quantum channel is one of the key issues in practical applications of quantum cryptography. Because the WDM used in telecom system can not meet the requirement of quantum channel, this paper first proposes a method of multiplexing quantum key channel on common telecom optical cable by using the composite wavelength division multiplexer (WDM) method, and proves its feasibility through experiments.