Frequency synchronization in dence FDM optical networks

FDM光网络中的频率同步

• 批准号: 07555118
• 负责人: KIKUCHI Kazuro
• 金额: $ 5.12万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555118/
• 关键词: Optical conmunications; frequency division multiplexing; wavelength comversion; 周波数安定化; 光波ネットワーク

We studied device and system technologies for future FDM optical networks. Tunable, lascrs, frequency conversion devices, and FDM transmission technologies were focused on, and main results are summarized in the followings.(1) Tunable lasersWe developed two types of frequency tunable laser at 1,5mum region. One is the external ring-cavity semiconductor laser. The mode-hop free operation has been achieved in this laser. The other is the Erbium-doped fiber laser, whose polarization and single mode are stabilized by a specially designed cavity structure.(2) Dense FDM transmission technologiesWe proposed a novel design method of dispersion management for long-distance dense FDM transmission systems. To increase the transmission capacity further, the midway phase conjugation was found to be effective.(3) All optical signal processing for FDM systemsWe developed an intra-cavity four-wave mixing device by using an external ring-cavity semiconductor laser. The high conversion efficiency and high signal-to-noise ratio have been achieved. This device can be used as a frequency converter and an optical phase conjugator.

我们研究了未来FDM光网络的设备和系统技术。重点介绍了可调谐激光器、变频器件和频分复用传输技术，主要研究成果如下。(1)可调谐激光器我们开发了两种类型的频率可调谐激光器在1.5微米的区域。一种是外环腔半导体激光器。该激光器实现了无跳模运转。另一种是掺铒光纤激光器，其偏振和单模通过专门设计的腔结构稳定。(2)密集频分复用传输技术提出了一种新的长距离密集频分复用传输系统色散管理设计方法。为了进一步增加传输容量，发现中间相位共轭是有效的。(3)频分复用系统的全光信号处理我们研制了一种采用外环腔半导体激光器的腔内四波混频装置。实现了高转换效率和高信噪比。该器件可用作频率转换器和光学相位共轭器。

项目成果

C.Lorattanasane,K.Kikuchi: "Design theory of long-distance optical transmission systems using midway optical phase conjugation" J.Lightwave Technol.(発表予定). (1997)

C.Lorattanasane、K.Kikuchi：“使用中途光学相位共轭的长距离光传输系统的设计理论”J.Lightwave Technol（即将发表）。

C.Lorattanasane and K.Kikuchi: "Design theory of long-distance optical transmission systems using midway optical phase conjugation" J.Lightwave Technol.(発表予定). (1997)

C.Lorattanasane 和 K.Kikuchi：“使用中途光学相位共轭的长距离光传输系统的设计理论”J.Lightwave Technol（即将发表）。

Y. Takushima and K. Kikuchi: "Spectral gain hole burning and modulation instability in a Brillouin fiber amplifier" Optics Lettevs. 20. 34-36 (1995)

Y. Takushima 和 K. Kikuchi：“布里渊光纤放大器中的光谱增益烧孔和调制不稳定性”Optics Lettevs。

Y.Takushima etal.: "Single-frequency and polarization-stable oscillation of Fabry-Perot fiber laser using a non polarization-maintaining fiber" IEEE Photonics Technol.Lett.8,11. 1468-1470 (1995)

Y.Takushima 等人：“使用非保偏光纤的法布里-珀罗光纤激光器的单频和偏振稳定振荡”IEEE Photonics Technol.Lett.8,11。

K.Kikuchi etal.: "Observation of quasi-phase matched four-wave mixing assisted by periodic power variation in a long-distance optical amplifer chain" IEEE Photonics Technol.Lett.7,11. 1378-1380 (1995)

K.Kikuchi 等人：“长距离光学放大器链中周期性功率变化辅助的准相位匹配四波混频的观察”IEEE Photonics Technol.Lett.7,11。