Relativistic cross-phase modulation driven compression of Terawatt laser pulses to Sub-7 fs Regime: A scalable approach to petawatt systems

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2026-07-01 Epub Date: 2026-02-05 DOI:10.1016/j.yofte.2026.104552

Sintu Kumar, Km Shivani Bhardwaj, Preeti Gupta, Madan Singh Chauhan

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Abstract

A numerical mechanism for the dramatic temporal compression of ultra-intense laser pulses investigated by solving the coupled nonlinear envelope equations incorporating group velocity dispersion (GVD), relativistic self-phase modulation (SPM), and cross-phase modulation (XPM). We demonstrate the co-propagation dynamics of pump and probe pulses in a under dense plasma, we report a signature of relativistic XPM that induces a symmetric spectral broadening, facilitating the self-compression of a 100 fs sech² probe pulse down to 6.65 fs at Terawatt (TW) power levels. This 15-fold compression is achieved without external dispersion compensation, relying solely on the intrinsic plasma medium. Furthermore, we analyse the scalability of this technique, highlighting how the damage free nature of plasma optics allows this Sub-7 fs compression scheme to be extended to Petawatt (PW) class lasers, providing a robust driver for next-generation high field physics experiments.

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相对论交叉相位调制驱动的太瓦激光脉冲压缩到低于7秒的状态：一种可扩展的方法用于千瓦系统

通过求解包含群速度色散（GVD）、相对论自相位调制（SPM）和交叉相位调制（XPM）的耦合非线性包络方程，研究了超强激光脉冲剧烈时间压缩的数值机制。我们证明了泵浦脉冲和探测脉冲在低密度等离子体中的共传播动力学，我们报告了一个相对论性XPM的特征，它诱导了对称的光谱加宽，促进了100 fs sec2探测脉冲在太瓦（TW）功率水平下的自压缩到6.65 fs。这15倍的压缩是实现没有外部色散补偿，完全依赖于本征等离子介质。此外，我们分析了该技术的可扩展性，强调了等离子体光学的无损伤特性如何使这种sub - 7fs压缩方案扩展到PW级激光器，为下一代高场物理实验提供了强大的驱动程序。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.