arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.00927physics.opticsphysics.bio-ph
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飞秒倍频掺铒光纤laser的双光子荧光成像

Frequency-doubled femtosecond Er-doped fiber laser for two-photon excited fluorescence imaging

Dorota Stachowiak, Jakub Bogusławski, Aleksander Głuszek, Zbigniew Łaszczych, Maciej Wojtkowski, Grzegorz Soboń

摘要:

研制了一种脉冲重复频率可调的飞秒倍频掺铒光纤激光器,并将其应用于双光子激发荧光显微术。全光纤激光器系统提供了波长为1560 nm的基波脉冲,持续时间为22 fs,用于二次谐波产生,导致在780 nm处产生1.35 nJ,60 fs的脉冲。重复率由内置在放大器链中的脉冲选择器单元调整,直接为1至12 MHz之间的任何选定重复率提供变换限制脉冲。我们采用激光光源驱动扫描双光子激发荧光显微镜离体大鼠皮肤和其他样品成像在不同的脉冲重复率。由于紧凑,易于操作,和合适的脉冲特性的激光源,可以被认为是一个有吸引力的替代钛:蓝宝石激光器在生物医学成像。

英文摘要:

A femtosecond frequency-doubled Erbium-doped fiber laser with adjustable pulse repetition rate is developed and applied in two-photon excited fluorescence microscopy. The all-fiber laser system provides the fundamental pulse at 1560 nm wavelength with 22 fs duration for the second harmonic generation, resulting in 1.35 nJ, 60 fs pulses at 780 nm. The repetition rate is adjusted by a pulse picker unit built-in within the amplifier chain, directly providing transform-limited pulses for any chosen repetition rate between 1 and 12 MHz. We employed the laser source to drive a scanning two-photon excited fluorescence microscope for ex vivo rat skin and other samples imaging at various pulse repetition rates. Due to compactness, ease of operation, and suitable pulse characteristics the laser source can be considered as an attractive alternative for Ti:sapphire laser in biomedical imaging.

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