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arXiv 1810.02151physics.optics
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光子晶体光纤中UV孤子动力学和拉曼增强超连续谱的产生

UV soliton dynamics and Raman-enhanced supercontinuum generation in photonic crystal fiber

Pooria Hosseini, Alexey Ermolov, Francesco Tani, David Novoa, Philip St. J. Russell

摘要:

超快宽带紫外辐射在光谱学和光化学中具有重要意义,因为高光子能量使单光子激发成为可能,超短脉冲使时间分辨研究成为可能。在这里,我们报告使用充气空芯光子晶体光纤(HC-PCF)的高效超快非线性光学在紫外线。孤子自压缩的400 nm脉冲(前所未有的低)~500 nJ的能量下降到亚6 fs的持续时间,以及从这些孤子的可调谐色散波的共振发射。此外,我们还讨论了在充氢的HC-PCF中产生从深紫外到可见光的平坦超连续谱。与充氩光纤的比较表明,在高频增强拉曼增益,使氢系统更有效。随着HC-PCF技术的发展,我们预计这些基于光纤的紫外光源将带来新的应用。

英文摘要:

Ultrafast broadband ultraviolet radiation is of importance in spectroscopy and photochemistry, since high photon energies enable single-photon excitations and ultrashort pulses allow time-resolved studies. Here we report the use of gas-filled hollow-core photonic crystal fibers (HC-PCFs) for efficient ultrafast nonlinear optics in the ultraviolet. Soliton self-compression of 400 nm pulses of (unprecedentedly low) ~500 nJ energies down to sub-6-fs durations is achieved, as well as resonant emission of tunable dispersive waves from these solitons. In addition, we discuss the generation of a flat supercontinuum extending from the deep ultraviolet to the visible in a hydrogen-filled HC-PCF. Comparisons with argon-filled fibers show that the enhanced Raman gain at high frequencies makes the hydrogen system more efficient. As HC-PCF technology develops, we expect these fiber-based ultraviolet sources to lead to new applications.

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