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arXiv 2402.12911physics.opticsphysics.bio-ph
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利用皮秒激光脉冲的高效多光子显微术

Efficient multiphoton microscopy with picosecond laser pulses

Katarzyna Kunio, Jakub Bogusławski, Grzegorz Soboń

AI总结:

本文开发了一种集成脉冲选择器的10 nJ Yb:fiber皮秒激光器,证明通过降低脉冲重复频率可在多光子显微术中达到与飞秒脉冲相当的性能,且更抗色散,从而可省略时间压缩并采用更简单的全光纤装置。

摘要:

多光子显微镜采用飞秒激光器作为光源,因为超短脉冲的高峰值功率能够对被测样品中的荧光进行多光子激发。然而,如此短的脉冲在显微镜的高色散光学元件中容易发生展宽,需要仔细的色散管理,否则会降低激发效率。在此,我们开发了一种带有集成脉冲选择器单元的10 nJ Yb:fiber皮秒激光器,并评估了其在多光子显微术中的性能。我们的结果表明,仅通过降低脉冲重复频率,皮秒脉冲就可以获得与飞秒脉冲相当的性能,并且这种脉冲受色散的影响显著更小。这些发现证明,光纤激光器的时间压缩并不总是高效的,通过使用更小、更易用的全光纤装置可以省略时间压缩。

英文摘要:

Multiphoton microscopes employ femtosecond lasers as light sources because the high peak power of the ultrashort pulse allows for multiphoton excitation of fluorescence in the examined sample. However, such short pulses are susceptible to broadening in a microscope's highly dispersive optical elements and require careful dispersion management, otherwise decreasing excitation efficiency. Here, we have developed a 10 nJ Yb:fiber picosecond laser with an integrated pulse picker unit and evaluated its performance in multiphoton microscopy. Our results show that performance comparable to femtosecond pulses can be obtained with picosecond pulses only by reducing the pulse repetition rate and that such pulses are significantly less prone to the effect of chromatic dispersion. These findings proved that the temporal compression of fiber lasers is not always efficient, and it can be omitted by using a smaller and easier-to-use all-fiber setup. \c{opyright} 2024 Optica Publishing Group. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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