Study on generation and propagation of sub-20 femto-second optical fiber soliton pulses

亚20飞秒光纤孤子脉冲的产生与传播研究

基本信息

批准号：
13450136
负责人：
TSUCHIYA Masahiro
金额：
$ 4.29万
依托单位：
National Institute of Information and Communications Technology (2003)The University of Tokyo (2001-2002)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

The effect of higher order fiber-optical soliton is often used for ultrashort pulse compression. Indeed, 20 femto-second (fs) pulse generation or shorter is possible through the method, which corresponds to only four cycles of 1500 nm electromagnetic wave. In order to clarify the ultimate performance and its limiting factors in the lower boundary of the time domain, we have utilized the phenomena of higher order fiber-optical soliton compression. Furthermore, we discussed on the framework for optimization of the spectral shapes thus generated for optical communication light source of multiple carriers. We have reached the conclusion, which includes some newly achieved knowledge, that the fourth order dispersion is an important feature for the ultimate characteristics of ultrashort fiber-optic soliton pulses since it leads to the limiting factor in the time domain and affects the high bandwidth super-continuum generation. The followings are the results obtained in the present research.( … More 1)The shortest fiber optic soliton pulse ever reported has been successfully derived. Its time period is 15.6 fs. We believe that the new temporal area in the fiber-optic ultrafast photonics has been established.(2)We pointed out that the ultimate pulse width of fiber-optical soliton is restricted by the fourth order dispersion through the anomalous dispersion bandwidth. This has been confirmed experimentally by means of systematic investigation on temporal widths of generated pulsed under a variety of conditions. Indeed, this is the first clear evidence that the fourth order dispersion effect of an optical fiber appears in a realistic and clear manner.(3)On the other hand, we found out experimentally that the fourth order dispersion effect can give rise to efficient parametric gain generation of broadband. Also, the theoretical explanation for the phenomena has been established.(4)On the basis of the results of (3), we demonstrated a few new schemes for broadband optical spectrum generation methods. Less

高阶纤维光固体的影响通常用于超短脉冲压缩。实际上，通过该方法，可以使用20个FEMTO秒（FS）脉冲产生或短，这仅对应于1500 nm电磁波的四个循环。为了阐明时间域下边界中的最终性能及其限制因子，我们利用了高阶光纤固体压缩的现象。此外，我们讨论了用于优化多个载流子的光通信光源的光谱形状的框架。我们已经得出了结论，其中包括一些新实现的知识，即第四阶分散是超舒用光纤孤子脉冲的最终特征的重要特征，因为它会导致时间域中的限制因素，并影响高带宽超级碳的产生。以下是本研究中获得的结果。（更多1）有史以来最短的光纤孤子脉冲已成功得出。它的时间段为15.6 fs。我们认为，已经建立了光纤超快光子学中的新临时区域。（2）我们指出，光纤孤子的最终脉冲宽度受到通过异常分散带宽的第四阶分散的限制。通过系统投资在各种条件下产生的脉冲的临时宽度进行实验证实。确实，这是第一个明确的证据表明，光纤的第四阶分散效应以现实和清晰的方式出现。（3）另一方面，我们在实验上发现，第四阶分散效应可以产生有效的宽带参数增益产生。同样，已经建立了对现象的理论解释。（4）根据（3）的结果，我们证明了一些用于宽带光谱生成方法的新方案。较少的