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Wavelength and waveform conversion scheme of optical signal between different types of optical networks

不同类型光网络之间光信号的波长和波形转换方案

基本信息

批准号：
18560330
负责人：
KISHI Naoto
金额：
$ 2.24万
依托单位：
The University of Electro-Communications
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560330/
关键词：
WDM optical communication semiconductor optical amplifier nonlinear fibre optical wavelength conversion optical waveform conversion optical network

项目摘要

The purpose of the project is to develop optical interfaces to convert the wavelength/waveform of optical signal between different optical networks. The achievements of this project are as follows.With the use of a multi-stage semiconductor optical-amplifier based wavelength converter, large wavelength hopping over 300 nm was achieved for optical signals with bit-rates of 2.5 Gb/s and Gb/s. Waveform regeneration with inverting wavelength conversion was achieved. Multi-casting of optical signal at 1550 nm wavelength band was also demonstrated with the multi-stage wavelength converter, by which signal degradation due to nonlinear-mixing in semiconductor optical amplifier was successfully suppressed.Pulse-width tunable waveform conversion by combination of fiber- and semiconductor-based switches was success-fully applied for NRZ(non return-to-zero) to RZ(return-to-zero) conversion. The output pulsewidth was tunable between 20 ps and 80 ps. Due to the pulsewidth conversion, transmission performance over 20 km was largely improved.As an alternative way for pulsewith-shrinking, Raman amplifier based pulsewidth compressor was also examined. Output pulsewidth tunability for modulated signal between 13 ps and 3 ps was achieved.As an application of waveform conversion technique with a semiconductor optical-amplifier, widely wavelength-tunable optical clock pulse generator was developed. Higher-quality optical clock pulses were obtained in comparison with conventional wavelength-tunable lightsources. Waveform optimization method with this optical clock was also found.

该项目的目的是开发光接口，在不同的光网络之间转换光信号的波长/波形。本项目的成果如下：采用基于多级半导体光放大器的波长转换器，实现了比特率为2.5 Gb/s和Gb/s的光信号在300 nm以上的大波长跳变。利用反相波长变换实现了波形再生。利用该多级波长转换器，成功地抑制了半导体光放大器中非线性混频引起的信号衰减，实现了1550nm波段光信号的多路投射。通过光纤和半导体开关的组合，成功地将脉冲宽度可调波形转换应用于NRZ（非归零）到RZ（归零）转换。输出脉宽在20ps和80ps之间可调。由于脉宽转换，20公里以上的传输性能大大提高。本文还研究了基于拉曼放大器的脉宽压缩器作为脉冲收缩的替代方法。输出脉宽可调调制信号在13和3ps之间实现。宽波长可调谐光时钟脉冲发生器是将半导体光放大器的波形转换技术应用到光时钟脉冲发生器中。与传统波长可调光源相比，获得了更高质量的光时钟脉冲。并利用该光时钟找到了波形优化的方法。