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Absolute terahertz power measurement of a time-domain spectroscopy system

机译:时域光谱系统的绝对太赫兹功率测量

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We report on, to the best of our knowledge, the first absolute terahertz (THz) power measurement of a photoconductive emitter developed for time-domain spectroscopy (TDS). The broadband THz radiation emitted by a photoconductor optimized for the excitation with 1550-nm femtosecond pulses was measured by an ultrathin pyroelectric thin-film (UPTF) detector. We show that this detector has a spectrally flat transmission between 100 GHz and 5 THz due to special conductive electrodes on both sides of the UPTF. Its flat responsivity allows the calibration with a standard detector that is traceable to the International System of Units (SI) at the THz detector calibration facility of PTB. Absolute THz power in the range from below 1 mu W to above 0.1 mW was measured. (C) 2015 Optical Society of America
机译:据我们所知,我们报道了为时域光谱(TDS)开发的光导发射器的首次绝对太赫兹(THz)功率测量。通过超薄型热释电薄膜(UPTF)检测器测量了为1550 nm飞秒脉冲的激发而优化的光电导体发出的宽带太赫兹辐射。我们显示,由于UPTF两侧都有特殊的导电电极,该检测器在100 GHz和5 THz之间具有频谱平坦的透射率。其平坦的响应度允许使用标准检测器进行校准,该检测器可追溯到PTB的THz检测器校准设施中的国际单位制(SI)。测量的绝对THz功率在低于1μW到高于0.1 mW的范围内。 (C)2015年美国眼镜学会

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