相干光通信链路外差接收技术研究

发布时间：2018-02-22 01:53

本文关键词： 相干光通信外差探测异步解调　出处：《激光杂志》2016年02期 　论文类型：期刊论文

【摘要】：相干光通信链路属于天地一体化高速通讯网络节点连接的关键链路。着眼于外差效率表征大气湍流扰动之后信号光及本振光相干合成指标,从而推导非均匀湍流路径上外差效率理论表达式,充分结合大气折射率结构常数轮廓进行相干光通信链路外差效率仿真。目前,主流光通信系统均是运用幅度调值或是直接解调方式实现通信,也就是说将光看作载波,信号作光载波施以强度调制方式,接收端侧信道中所传递的光信号可直接展开包络解调,恢复发端信号以实现通信。此类系统接收灵敏度偏低,同时频带利用率不高,使得系统中继距离及传输容量非常有限。本文分析了相干光通信链路外差技术,并提出实用性应用策略。
[Abstract]:Coherent optical communication link is the key link of integrated high-speed communication network connections. Focusing on the characterization of the atmospheric turbulence after the heterodyne efficiency of signal light and local oscillator light coherent synthesis index, which is an inhomogeneous turbulent path on the heterodyne efficiency formula, combining the atmospheric structure constant of refractive index profile of the coherent optical communication link heterodyne efficiency simulation. At present, the mainstream of optical communication systems are using the amplitude value or is the communication between the direct demodulation method, that is to say the light as a carrier signal for optical carrier with intensity modulation, optical signal transmission receiver side channel can be directly carried out demodulation and restore the originator of the signal in order to achieve communication. This system receives low sensitivity at the same time, the bandwidth utilization rate is not high, which makes the system relay distance and transmission capacity is very limited. This paper analyzes the coherent optical communication chain Road heterodyne technology, and put forward practical application strategies.

【作者单位】：邢台职业技术学院;
【基金】：邢台市科技局科技计划自筹项目(2015ZC015)
【分类号】：TN929.1

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