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全稳定多太瓦光学波形合成器：迈向千兆瓦级孤立阿秒脉冲。

Fully stabilized multi-TW optical waveform synthesizer: Toward gigawatt isolated attosecond pulses.

作者信息

Xue Bing, Tamaru Yuuki, Fu Yuxi, Yuan Hua, Lan Pengfei, Mücke Oliver D, Suda Akira, Midorikawa Katsumi, Takahashi Eiji J

机构信息

Attosecond Science Research Team, RIKEN Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan.

Department of Physics, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.

出版信息

Sci Adv. 2020 Apr 17;6(16):eaay2802. doi: 10.1126/sciadv.aay2802. eCollection 2020 Apr.

DOI:10.1126/sciadv.aay2802
PMID:32494595
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7164932/
Abstract

A stable 50-mJ three-channel optical waveform synthesizer is demonstrated and used to reproducibly generate a high-order harmonic supercontinuum in the soft x-ray region. This synthesizer is composed of pump pulses from a 10-Hz repetition-rate Ti:sapphire pump laser and signal and idler pulses from an infrared two-stage optical parametric amplifier driven by this pump laser. With full active stabilization of all relative time delays, relative phases, and the carrier-envelope phase, a shot-to-shot stable intense continuum harmonic spectrum is obtained around 60 eV with pulse energy above 0.24 μJ. The peak power of the soft x-ray continuum is evaluated to be beyond 1 GW with a 170-as transform limit duration. We found a characteristic delay dependence of the multicycle waveform synthesizer and established its control scheme. Compared with the one-color case, we experimentally observe an enhancement of the cutoff spectrum intensity by one to two orders of magnitude using three-color waveform synthesis.

摘要

展示了一种稳定的50毫焦三通道光学波形合成器，并用于在软X射线区域可重复地产生高阶谐波超连续谱。该合成器由来自重复频率为10赫兹的钛宝石泵浦激光器的泵浦脉冲以及由该泵浦激光器驱动的红外两级光学参量放大器产生的信号和闲频脉冲组成。通过对所有相对时间延迟、相对相位和载波包络相位进行完全主动稳定，在60电子伏特左右获得了逐次稳定的强连续谐波谱，脉冲能量高于0.24微焦。软X射线连续谱的峰值功率经评估超过1吉瓦，具有170阿秒的变换极限持续时间。我们发现了多周期波形合成器的特征延迟依赖性并建立了其控制方案。与单色情况相比，我们通过实验观察到，使用三色波形合成时截止谱强度提高了一到两个数量级。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/5aadf0d55273/aay2802-F6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/38e175c0dc0c/aay2802-F1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/0404c391612b/aay2802-F2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/4d9baaa4b84e/aay2802-F3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/7f37b195a24a/aay2802-F4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/d8ebfbf3f0d9/aay2802-F5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/5aadf0d55273/aay2802-F6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/38e175c0dc0c/aay2802-F1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/0404c391612b/aay2802-F2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/4d9baaa4b84e/aay2802-F3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/7f37b195a24a/aay2802-F4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/d8ebfbf3f0d9/aay2802-F5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3ec/7164932/5aadf0d55273/aay2802-F6.jpg

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Enhanced multi-colour gating for the generation of high-power isolated attosecond pulses.用于产生高功率孤立阿秒脉冲的增强型多色选通
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