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光衰减技术是一种重要的光学技术 ,它在许多领域有重要的应用 在量子密钥分配中采用光衰减技术可获得单光子序列 ,这是量子保密通信的基础 用线性分束耦合器形成多个输出口 ,将光强的时序衰减变为光强沿输出口的空间分布 ,研制出了量子保密通信用的精密控制强衰减器 ,实现了对光子数的精密控制
Optical attenuation technology is an important optical technology and it has important applications in many fields. Single-photon sequence can be obtained by optical attenuation technology in quantum key distribution. This is the basis of quantum confidential communication. An output port, the light intensity of the time attenuation into the light intensity along the output of the spatial distribution, developed a quantum confidential communications control precision attenuator, to achieve the precise control of the photon number