Tb/s Coherent Optical OFDM Systems Enabled by Optical Frequency Combs
Tb/s Coherent Optical OFDM Systems Enabled by Optical Frequency Combs
复制标题
由光频率梳支持的 Tb/s 相干光 OFDM 系统
DOI：
10.1109/jlt.2010.2053348
复制
发表时间：
2010-07-15
影响因子：
4.7
通讯作者：
Ben Yoo, S. J.
中科院分区：
文献类型：
--
作者：
Yi, Xingwen;Fontaine, Nicolas K.;Ben Yoo, S. J.
本文讨论了在发射端和接收端通过并行处理相干光频率梳，利用低速电子学和光电子学实现太比特每秒的高速和高频谱效率的光传输。相干和并行处理实现了宽带光信号的电-光和光-电(E/O和O/E)转换，否则将超过传统光电子学的能力。在第一个实验中，光频梳(OFC)产生器提供32条梳状线，功率变化小于5分贝。随后，在318 GHz的无缝光带宽内，采用16-QAM调制在32106个OFDM子载波上实现了1.008 TB/S的调制能力。它展示了一种产生光OFDM信号的有效方法，其光带宽比模数转换器和数模转换器(ADC/DAC)的光带宽宽几十倍。第二个实验演示了使用另一个光学频率梳、用于实现主要光学器件的二氧化硅平面光波电路(PLC)和两对平衡光电二极管从32频段相干光OFDM信号中同时检测多个OFDM频段。实验结果表明，在芯片级平台上实现光集成相干光正交频分复用系统具有广阔的前景。
This paper discusses the realization of terabit per second high speed and high spectral-efficiency optical transmissions using much lower speed electronics and optoelectronics through parallel processing of coherent optical frequency combs at both the transmitter and receiver. The coherent and parallel processing enables electrical-to-optical and optical-to-electrical (E/O and O/E) conversion of wide-bandwidth optical signals which would otherwise exceeds the capability of conventional optoelectronics. In the first experiment, an optical frequency comb (OFC) generator provides 32 comb lines with less than 5-dB power variation. Subsequently, 1.008-Tb/s modulation capability is realized on 32 106 OFDM subcarriers with 16-QAM modulation in a 318-GHz seamless optical bandwidth. It demonstrates an effective way to generate an optical OFDM signal with tens of times wider optical bandwidth than that of analog-to-digital converters and digital-to-analog converters (ADC/DAC). The second experiment demonstrates simultaneous detection of multiple OFDM bands from a 32-band coherent optical OFDM signal using another optical frequency comb, a silica planar lightwave circuit (PLC) that implemented the major optical devices, and two pairs of balanced photodiodes. The experimental results indicate prospects for an optically integrated coherent optical OFDM system on a chip-scale platform.