Study on all optical signal regeneration technology in ultrafast optical communication system

超快光通信系统全光信号再生技术研究

• 批准号: 12305026
• 负责人: KIKUCHI Kazuro
• 金额: $ 22.6万
• 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: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12305026/
• 关键词: all opticall signal regeneration; nonlinear optical device; Optical switch; WDM; OTDM; 光ファイバ通信; 超短光パルス; クロック抽出; ソノグラム

All-optical nonlinear interferometric switches (NIS) are very attractive devices to realize the all optical 2R/3R function. The Mach-Zehnder interferometer (MZI) using semiconductor optical amplifiers and the nonlinear optical loop mirror (NOLM) using dispersion-shifted fibers are good candidates for practical NIS configurations.When these NIS 's are periodically inserted in a long-distance transmission system using optical amplifiers, we can expect that the NIS's prevent the degradation of the SNR induced by the accumulation of the optical amplifier noise.We derive a simple formula for calculating the SNR in the transmission system where NIS's are periodically inserted. Prom this formula, we clearly see that the SNR can be maintained at a certain value even after the signal traveling over an infinite distance. This formula also predicts that there exists a critical level of the optical amplifier noise. When the optical amplifier noise is larger than the critical level, the improvement of the SNR can no longer be achieved.We also construct a NOLM composed of a 50-m highly-nonlinear dispersion-shifted fiber, and succeed in switching of 0.5-ps optical pulses. In addition, the polarization diversity scheme for the NOLM is demonstrated.

全光非线性干涉测量开关（NIS）是实现所有光学2R/3R功能的非常有吸引力的设备。 The Mach-Zehnder interferometer (MZI) using semiconductor optical amplifiers and the nonlinear optical loop mirror (NOLM) using dispersion-shifted fibers are good candidates for practical NIS configurations.When these NIS 's are periodically inserted in a long-distance transmission system using optical amplifiers, we can expect that the NIS's prevent the degradation of the SNR induced by the accumulation在光学放大器的噪声中，我们得出了一个简单的公式，用于计算定期插入NIS的传输系统中的SNR。舞会这个公式，我们清楚地看到，即使信号在无限距离上传播后，SNR也可以保持在一定值。该公式还预测，光放大器噪声的临界水平。当光学放大器噪声大于临界水平时，无法再实现SNR的改进。我们还构建了由50米高度非固定性分散型纤维组成的NOLM，并成功切换了0.5-PS光学脉冲。此外，还展示了NOLM的极化多样性方案。

项目成果

Han Chuen Lim, T. Sakamoto, and K. Kikuchi: "Polarization-independent optical demultiplexing by conventional nonlinear optical loop mirror in a polarization diversity loop configuration"IEEE Photonics Technol. Lett.. vol.12, no.12. 1704-1706 (2000)

Han Chuen Lim、T. Sakamoto 和 K. Kikuchi：“偏振分集环路配置中传统非线性光学环路镜的偏振无关光学解复用”IEEE Photonics Technol。

K.Taira and K.Kikuchi: "Highly-sensitive frequency-resolved optical gating in the 1.55 um region using an organic nonlinear opticalcrystal for second-harmonic generation"IEEE Photonics Technology Lett.. 36,20. 1719-1720 (2000)

K.Taira 和 K.Kikuchi：“使用有机非线性光学晶体在 1.55 um 区域实现二次谐波产生的高灵敏度频率分辨光学选通”IEEE 光子技术快报 36,20。

T.Sakamoto, K.Kikuchi: "Analyses of all-optically regenerated transmission system using nonlinear interferometric switches"IEEE Photonics Technol. Lett.. 13,9. 1020-1021 (2001)

T.Sakamoto、K.Kikuchi：“使用非线性干涉开关的全光再生传输系统的分析”IEEE Photonics Technol。

T.Sakamoto, K.Kikuchi: "Analyses of all-optically regenerated transmission system using nonlinear interferometric switches"IEEE Photonics Technol. Lett.. 13. 1020-1021 (2001)

T.Sakamoto、K.Kikuchi：“使用非线性干涉开关的全光再生传输系统的分析”IEEE Photonics Technol。

T.Sakamoto et al.: "All-optical wavelength conversion of 500-fs pulse trains by using nonlinear-optical evop mirror・・・"IEEE Photonics Technol. Lett.. 13. 502-504 (2001)

T. Sakamoto 等人：“使用非线性光学 evop 镜对 500-fs 脉冲串进行全光波长转换...” IEEE Photonics Technol.. 13. 502-504 (2001)