Calibration of a thermal detector for pulse energy measurement of terahertz radiation

Yingxin Wang; Ziran Zhao; Zhiqiang Chen; Kejun Kang

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Calibration of a thermal detector for pulse energy measurement of terahertz radiation

机译：校准太赫兹辐射脉冲能量的热探测器

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We present a calibration method for measuring the terahertz pulse energy through a conventional thermal power detector. Short terahertz pulses were generated by mechanically modulating a continuous wave source with a chopper containing a narrow slot and detected by a Golay cell. We use a calibrated calorimeter to monitor the total source power so we can know the terahertz pulse energy in advance. The Golay detector response to rectangular pulses is theoretically analyzed and the peak amplitude of its output signal is found to be the relevant parameter to determine the pulse energy. We accomplish absolute calibration for the pulse responsivity of the Golay cell by examining the linear correlation between the output signal and the incident energy.

机译：我们提出了一种通过常规热功率检测器测量太赫兹脉冲能量的校准方法。短太赫兹脉冲是通过用包含窄缝的斩波器对连续波源进行机械调制而产生的，并由Golay电池检测到。我们使用校准的量热计来监视总的源功率，因此我们可以提前知道太赫兹脉冲能量。从理论上分析了Golay检测器对矩形脉冲的响应，发现其输出信号的峰值幅度是确定脉冲能量的相关参数。通过检查输出信号和入射能量之间的线性相关性，我们完成了对Golay电池的脉冲响应性的绝对校准。

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《Optics Letters》 |2012年第21期|共3页
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Yingxin Wang; Ziran Zhao; Zhiqiang Chen; Kejun Kang;
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Calibration of a thermal detector for pulse energy measurement of terahertz radiation

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