太赫兹空气相干探测技术引起的太赫兹脉冲畸变
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作者单位:

1.南昌航空大学,无损检测技术教育部重点实验室,江西 南昌,330063;2.江西省光电信息科学与技术重点实验,江西 南昌,330063;3.南昌航空大学,测试与光电工程学院,江西 南昌,330063

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Correspnding author. Email: haiweidu@nchu.edu.cn

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Distortions of terahertz pulses induced by the air coherent detection technique
Author:
Affiliation:

1.Key Laboratory of Nondestructive Testing Technology (Ministry of Education), Nanchang Hangkong University, Nanchang, Jiangxi 330063, China;2.Key Laboratory of Opto-Electronic Information Science and Technology of Jiangxi Province, Nanchang Hangkong University, Nanchang, Jiangxi 330063, China;3.School of Measuring and Optical Engineering, Nanchang Hangkong University, Nanchang, Jiangxi 330063, China

Fund Project:

Project supported by the National Natural Science Foundation of China (Grant No. 12064028), and Open Foundation of Key Laboratory of Nondestructive Testing Technology (Ministry of Education)(Grant No. EW202108218).

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    摘要:

    太赫兹空气相干探测技术是一种宽带探测技术,目前已被广泛应用于宽带太赫兹技术中。该技术的频率响应由探测激光脉冲宽度决定。因此,不同的探测激光脉冲在探测过程可能引起太赫兹脉冲的畸变。本文基于数值计算研究了空气相干探测技术引起的太赫兹脉冲的脉冲畸变和能量损失。结果显示,这种脉冲畸变和能量损失主要依赖探测激光脉冲宽度和待探测的太赫兹脉冲的中心频率。本项工作对于估测在宽带太赫兹技术中使用空气相干探测技术的性能和表现有很好的帮助。

    Abstract:

    Terahertz air coherent detection technique is a broadband detection method, which has been widely used in the broadband terahertz technology after its demonstration in the experiment. The frequency response of this method is determined by the duration of the probe laser pulse. Thus, the different probe lasers might induce distortions of terahertz pulses during the detection process. In this paper, the distortions and the energy loss of the terahertz pulses induced by the air coherent detection technique are quantitatively investigated based on the simulations. The results show that the pulse distortions and the energy loss depend on the duration of the probe laser pulse and the central frequency of terahertz pulse to be detected. This work will help to estimate the influence of the air coherent detection technique in the broadband terahertz technology.

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历史
  • 收稿日期:2021-09-02
  • 最后修改日期:2022-03-05
  • 录用日期:2021-10-29
  • 在线发布日期: 2022-02-28
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