论文标题
光学通信中的量子限制
Quantum Limits in Optical Communications
论文作者
论文摘要
本教程回顾了孔波容量极限，作为一种通用工具，可以在各种光学通信方案中分析最终传输速率，从传统的光学放大光纤链接到使用功率限制的光信号的自由空间通信。规范添加剂白色高斯噪声模型用于描述光学信号的传播。当在传播过程中获得的噪声的功率频谱密度与单个光子的能量相比，在繁殖过程中获取的噪声的功率频谱密度很小时，孔波极限大大超过了标准的香农限制。通过讨论光子饥饿制度中有效的沟通策略的讨论来说明一般结果。
This tutorial reviews the Holevo capacity limit as a universal tool to analyze the ultimate transmission rates in a variety of optical communication scenarios, ranging from conventional optically amplified fiber links to free-space communication with power-limited optical signals. The canonical additive white Gaussian noise model is used to describe the propagation of the optical signal. The Holevo limit exceeds substantially the standard Shannon limit when the power spectral density of noise acquired in the course of propagation is small compared to the energy of a single photon at the carrier frequency per unit time-bandwidth area. General results are illustrated with a discussion of efficient communication strategies in the photon-starved regime.
