宽带中红外光脉冲在大气中的传播

IF 5.4 1区 物理与天体物理 Q1 OPTICS
APL Photonics Pub Date : 2024-08-06 DOI:10.1063/5.0218225
Christian Hensel, Lenard Vamos, Igor Tyulnev, Ugaitz Elu, Jens Biegert
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引用次数: 0

摘要

我们研究并描述了超短和宽带中红外光脉冲在环境大气中的重塑。虽然所有脉冲传播都会发生色散和吸收,从而导致脉冲重塑,但由于大气中分子成分的振荡器强度要高出几个数量级,因此对中红外宽带辐射的影响非常明显。一个明显的宏观影响是测量到的自相关函数从双曲正割方形转变为洛伦兹方形,我们根据脉冲传播(包括分子自由感应衰减)对此进行了全面解释。电光采样直接揭示了光波对大气分子自由感应衰变的响应,基于克拉默-克罗尼格的传播模型彻底解释了观测结果。这些发现对于传感、远程探测、高能脉冲传播和能量传输等应用至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Propagation of broadband mid-infrared optical pulses in atmosphere
We study and describe the reshaping of ultrashort and broadband mid-IR optical pulses in an ambient atmosphere. While all pulse propagation undergoes dispersion and absorption, which causes pulse reshaping, the effects are strongly pronounced for broadband radiation in the mid-IR due to the orders of magnitude greater oscillator strengths of molecular constituents of our atmosphere. A noticeable macroscopic impact is a transition of the measured autocorrelation function from squared hyperbolic secant to Lorentzian, which we fully explain based on pulse propagation, including molecular free induction decay. Electro-optical sampling directly reveals the light wave response to atmospheric molecular free induction decay, and a Kramers–Kronig-based propagation model thoroughly explains the observation. The findings are essential for applications in sensing, standoff detection, high-energy pulse propagation, and energy delivery.
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来源期刊
APL Photonics
APL Photonics Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
10.30
自引率
3.60%
发文量
107
审稿时长
19 weeks
期刊介绍: APL Photonics is the new dedicated home for open access multidisciplinary research from and for the photonics community. The journal publishes fundamental and applied results that significantly advance the knowledge in photonics across physics, chemistry, biology and materials science.
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