In this paper we study the performance of subcarrier-wave quantum key distribution (SCW QKD) in the presence of classical channels of optical transport network utilizing dense wavelength division multiplexing (DWDM). We consider the impact of spontaneous Raman scattering noise as well as the four-wave mixing and channel isolation efficiency. We calculate quantum bit error rate as well as the secure key generation rate of SCW-QKD protocol for different parameters of DWDM system and quantum channel allocations. Our calculations show, that quantum channel allocation at the wavelength of 1310nm is preferable to allocation at C-band due to lower nonlinear noise, despite fiber’s larger attenuation at this wavelength.

在本文中，我们研究了在使用密集波分复用 (DWDM) 的光传输网络经典信道存在的情况下副载波量子密钥分发 (SCW QKD) 的性能。我们考虑了自发拉曼散射噪声以及四波混频和通道隔离效率的影响。针对DWDM系统的不同参数和量子信道分配，我们计算了SCW-QKD协议的量子比特误码率和安全密钥生成率。我们的计算表明，尽管光纤在该波长有较大的衰减，但由于非线性噪声较低，在 1310nm 波长分配量子信道优于在 C 波段分配。