俞兵, 王宝龙, 李宏光, 解琪, 马世帮. 太赫兹源发散角测量技术研究[J]. 应用光学, 2021, 42(3): 499-503. DOI: 10.5768/JAO202142.0303001
引用本文: 俞兵, 王宝龙, 李宏光, 解琪, 马世帮. 太赫兹源发散角测量技术研究[J]. 应用光学, 2021, 42(3): 499-503. DOI: 10.5768/JAO202142.0303001
YU Bing, WANG Baolong, LI Hongguang, XIE Qi, MA Shibang. Research on divergence angle measurement technique of terahertz sources[J]. Journal of Applied Optics, 2021, 42(3): 499-503. DOI: 10.5768/JAO202142.0303001
Citation: YU Bing, WANG Baolong, LI Hongguang, XIE Qi, MA Shibang. Research on divergence angle measurement technique of terahertz sources[J]. Journal of Applied Optics, 2021, 42(3): 499-503. DOI: 10.5768/JAO202142.0303001

太赫兹源发散角测量技术研究

Research on divergence angle measurement technique of terahertz sources

  • 摘要: 发散角是太赫兹源光束特性的重要衡量指标,是太赫兹光学系统设计的重要参数。研究了太赫兹源发散角测量原理,设计了一种由精密弧形导轨、斩波器、狭缝组件、太赫兹高莱探测器、锁相放大器和计算机系统组成的测量装置,设计了一种由自准直仪、光学角规和CCD相机组成的发散角测量装置标定模块,对太赫兹肖特基倍频源和太赫兹雪崩固态源的发散角进行了测量。此外,对测量结果不确定度进行了评定,其不确定度水平达到U_\rmrel=3.2%(k=2)。太赫兹源发散角的准确测量为深空探测、战术通信、反隐身、战场隐蔽目标识别等领域提供了有力的支撑。

     

    Abstract: The divergence angle is an important measurement index of the beam characteristics of terahertz sources and an important parameter in the design of terahertz optical system. The measurement principle of terahertz source divergence angle was studied, the measuring device was designed, which was composed of precise arc guide rail, chopper, narrow slit components, terahertz Golay detector, lock-in amplifier and computer system. And the calibration module of divergence angle measuring device was also designed, which included auto-collimator, optical angle gauges and CCD camera. And then, the divergence angle of terahertz Schottky frequency doubling source and the terahertz avalanche solid state source were measured. In addition, the uncertainty of measurement results was evaluated, and the uncertainty level reaches to U_\rmrel=3.2% (k=2). The accurate measurement of terahertz source divergence angle provides strong support for deep space detection, tactical communication, anti-stealth, battlefield concealed target recognition and so on.

     

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