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首页> 外文期刊>Applied optics >Picosecond laser electronic excitation tagging velocimetry using a picosecond burst-mode laser
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Picosecond laser electronic excitation tagging velocimetry using a picosecond burst-mode laser

机译：PICOSECOND激光电子激发标记VELOCIMETRY使用PICOSECOND突发模式激光器

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摘要

Detailed characterizations of picosecond laser electronic excitation tagging (PLEET) in pure nitrogen (N2) and air with a 24 ps burst-mode laser system have been conducted. The burst-mode laser system is seeded with a 200 fs broadband seeding laser to achieve short pulse duration. As a non-intrusive molecular tagging velocimetry (MTV) technique, PLEET achieves "writing" via photo-dissociating nitrogen molecules and "tracking" by imaging the molecular nitrogen emissions. Key characteristics and performance of utilization of a 24 ps pulse-burst laser for MTV were obtained, including lifetime of the nitrogen emissions, power dependence, pressure dependence, and local flow heating by the laser pulses. Based on the experimental results and physical mechanisms of PLEET, 24 ps PLEET can produce similar 100 kHz molecular nitrogen emissions by photodissociation, while generating less flowdisturbance by reducing laser joule heating than 100 psPLEET. (C) 2021 Optical Society of America
机译：在纯氮（N2）和空气中用24 ps脉冲激光系统对皮秒激光电子激发标签（PLEET）进行了详细的表征。脉冲模式激光系统采用200fs宽带种子激光实现短脉冲持续时间。作为一种非侵入性的分子标记测速（MTV）技术，PLEE通过光分解氮分子实现“写入”，并通过对氮分子发射进行成像实现“跟踪”。获得了用于MTV的24 ps脉冲突发激光器的关键特性和性能，包括氮发射的寿命、功率依赖性、压力依赖性和激光脉冲的局部流动加热。根据实验结果和PLET的物理机制，24 ps PLET可以通过光解产生类似的100 kHz分子氮发射，同时通过减少激光焦耳加热产生的流动干扰小于100 PSplet。（2021）美国光学学会

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  • 来源
    《Applied optics》 |2021年第15期|共8页
  • 作者

    Zhang Zhili; Jiang Naibo; Slipchenko Mikhail N.; Mance Jason G.; Roy Sukesh;

  • 作者单位

    Univ Tennessee Dept Mech Aerosp &

    Biomed Engn Knoxville TN 37996 USA;

    Spectral Energies LLC 4065 Execut Dr Beavercreek OH 45430 USA;

    Spectral Energies LLC 4065 Execut Dr Beavercreek OH 45430 USA;

    Spectral Energies LLC 4065 Execut Dr Beavercreek OH 45430 USA;

    Spectral Energies LLC 4065 Execut Dr Beavercreek OH 45430 USA;

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