波长交错高采样率高精度光电模数转换器的研究

项目名称： 波长交错高采样率高精度光电模数转换器的研究

项目编号： No.61275079

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 王美华

作者单位： 中国科学院半导体研究所

项目金额： 86万元

中文摘要： 高采样率高精度模数转换器是大容量光传输、模拟通信、雷达、电子对抗、以及高速高精密测试仪器的核心部件之一,在过去十几年里受到了广泛关注，并取得了巨大进展。但随着人类对信息容量和通信带宽需求的膨胀，单一依赖电子技术的模数转换器很难在实现高采样率的同时保证高精度性能。本目融合光与电各自的优点，提出了一种可以实现高采样率高精度模数转换的实用化方案。利用光电振荡器产生超稳定调制光信号，基于波分复用原理实现光信号中的多波长成分重叠，产生包含N路波长成分频率为F的超稳定高速采样信号；利用斩波技术，在保持原有脉宽的条件下，将频率降为F/N。经过色散介质的群速度延迟，将各波长成分分离，实现频率为F波长交错的超稳定采样光源。经过采样后，利用波分复用技术将高速串行光信号转换为低速并行信号进行高精度电量化。从而实现高速采样高精度量化的模数转换。

中文关键词： 高速光电子；光采样；光量化；；

英文摘要： High samplingr rate high resolution analog-to-digital converter （ADC）is one of the the key components for large capacity optical transmission, analog communication, lidar, electronic countermeasure. It is deserved widely attention and got great improvement in the past decades. The ADC based on pure electronic technologies can not fullfill the resolution and sampling-rate requirement anymore with the expending of the communicaiton capacity and bandwidth because of the difficulty to keep the high resolution while realizing high sampling rate. In this project, we propose a practical high sampling rate high resolution rate ADC scheme by combining the merits of the optics and electronics. The high sampling rate with frequency of F is generated based on optoelectronic oscillator. The signal is composed of multiple wavelength components. The sampling pulse is chopped to F/N frequency. The wavelength components walk off in dispersion media and the frequency of the sampling signal recover to F. After sampling, the high sampling rate serial signal is demulplexed to low sampling rate parallel signal based on WDM technolgy. And high resolution quantization is realized with the matural electronic ADC technology. Thus the high sampling rate high resolution ADC is realized.

英文关键词： High Speed Optoelectronics；Optical Sampling；Optical Quantization；；