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使用商用自由运行的激光器进行强大的非同步光学采样特拉赫兹光谱学.

Mayuri Nakagawa, Natsuki Kanda, Hidekazu Nakamae

    Optics express
    |June 14, 2025
    PubMed
    概括

    这项研究引入了一种使用自由运行的激光器进行异步光学采样 (太赫兹光谱) 的新方法. 该技术纠正了对高分辨率宽带太赫兹测量的时间动,增强了太赫兹时间域光谱应用.

    科学领域:

    • 物理科学 物理科学
    • 频谱学是一种光谱学.
    • 激光物理 激光物理

    背景情况:

    • 太赫兹时域光谱 (THz-TDS) 是一种强大的材料特征化技术.
    • 异步光学采样 (ASOPS) THz-TDS提供了优势,但通常需要精确的激光稳定.
    • 商业Ti:蓝宝石激光通常以自由运行的重复频率工作,这对ASOPS同步构成了挑战.

    研究的目的:

    • 开发和验证ASOPS THz-TDS中 jitter校正的后处理算法.
    • 为了使宽带THz光谱学具有高光谱分辨率,使用商业上可用的,自由运行的Ti:蓝宝石激光器.
    • 证明开发方法的稳定性和长期运行稳定性.

    主要方法:

    • 使用了异步光学采样 (ASOPS) 太赫兹光谱学.
    • 使用商用,自由运行的Ti:蓝宝石激光器,没有重复频率稳定.
    • 开发了一个后处理算法,利用乘以的重复频率差异作为校准信号来纠正动.
    • 在不同温度下研究了坚固性,并证明了长期运行.

    主要成果:

    • 在ASOPS THz-TDS系统中成功纠正了定时动.
    • 实现了带宽 (2.5 THz) 光谱学,具有高光谱分辨率 (82 MHz).

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  • 在不同温度下证明可靠的长期运行 (超过63小时),证实了强度.

    • 结论:

    • 开发的后处理算法有效地纠正了自由运行的激光ASOPS THz-TDS中的动.
    • 这种方法不需要精确的激光频率稳定,扩大了ASOPS THz-TDS的适用性.
    • 该技术为高分辨率宽带太赫兹光谱学提供了一个强大的和可访问的平台.