Supercontinuum generation in multimode optical fibres and waveguides

多模光纤和波导中的超连续谱产生

• 批准号: EP/E056369/1
• 负责人: Peter Horak
• 金额: $ 23.48万
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FE056369%2F1
• 关键词: Supercontinuum; generation; multimode; optical; fibres

When high-intensity short-pulse laser light propagates through optical fibres or planar waveguides, it experiences significant spectral broadening through nonlinear processes. Thus, single-wavelength laser light can be converted into broadband white light, a so-called supercontinuum spectrum. Such light sources have already been used for a range of scientific purposes, for example for precision spectroscopy which was awarded the 2005 Nobel Prize in Physics. However, for mass-market applications, for example in illumination and image projection, current systems provide too low power and not sufficent energy efficiency. A promising solution is to use fibres of larger core diameters for high power and to exploit multimode nonlinear effects for enhanced efficiency.However, while supercontinuum generation in single-mode fibres is well understood, very little is known about its multimode counterpart. Preliminary experiments suggest a spate of novel and exciting effects, but so far these more complex nonlinear systems are largely unexplored.Here, we propose to develop a theoretical framework to model such complex systems. We will perform detailed analytical investigations and develop computer code for efficient numerical simulations. We will then use these tools to obtain a thorough understanding of the fundamental physics of nonlinear multimode pulse propagation and to explain these novel observations. Finally, our results will allow us to design fibres for spatial and spectral tailoring of complex supercontinua, but will also provide novel insights into the physics of other high-power devices such as large-core fibre lasers and amplifiers.

当高强度短脉冲激光通过光纤或平面波导传输时，它会通过非线性过程经历显著的光谱展宽。因此，单波长激光可以被转换成宽带白色光，即所谓的超连续谱。这种光源已经被用于一系列科学目的，例如被授予2005年诺贝尔物理学奖的精密光谱学。然而，对于大众市场应用，例如在照明和图像投影中，当前系统提供太低的功率并且没有足够的能量效率。一个很有前途的解决方案是使用更大芯径的光纤来获得高功率，并利用多模非线性效应来提高效率。然而，尽管人们对单模光纤中超连续谱的产生有很好的了解，但对其多模光纤的了解却很少。初步的实验表明了一系列新颖和令人兴奋的效果，但到目前为止，这些更复杂的非线性系统在很大程度上是unexplored.Here，我们建议开发一个理论框架来模拟这样的复杂系统。我们将进行详细的分析调查，并开发有效的数值模拟的计算机代码。然后，我们将使用这些工具来获得非线性多模脉冲传播的基本物理的透彻理解，并解释这些新的观察。最后，我们的研究结果将使我们能够设计用于复杂超连续谱的空间和光谱剪裁的光纤，但也将为其他高功率器件（如大芯光纤激光器和放大器）的物理学提供新的见解。

项目成果

Nonlinear mode coupling of ultra-short pulses in optical fibres (Invited)

光纤中超短脉冲的非线性模式耦合（特邀）

• 发表时间: 2009
• 作者: P Horak

Spectral broadening and temporal compression of ~ 100 fs pulses in air-filled hollow core capillary fibers.

充气空心毛细管纤维中 ~ 100 fs 脉冲的光谱展宽和时间压缩。

• DOI: 10.1364/oe.22.001143
• 发表时间: 2014
• 期刊: Optics express
• 影响因子: 3.8
• 作者: Li C

Recent advances in highly nonlinear microstructured optical fibres (Invited)

高非线性微结构光纤的最新进展（特邀）

• 发表时间: 2009
• 作者: F Poletti

Spatio-Temporal Self-Focusing in Femtosecond Pulse Transmission Through Multimode Optical Fibers

• DOI: 10.1109/jlt.2012.2206796
• 发表时间: 2012-09
• 期刊: Journal of Lightwave Technology
• 影响因子: 4.7
• 作者: G. Hesketh;F. Poletti;P. Horák

Modal effects on pump-pulse propagation in an Ar-filled capillary.

• DOI: 10.1364/oe.18.013279
• 发表时间: 2010-06
• 期刊: Optics express
• 影响因子: 3.8
• 作者: R. Chapman;T. Butcher;P. Horák;F. Poletti;J. Frey;W. Brocklesby