Opt Lett. 2015 Aug 1;40(15):3544-7. doi: 10.1364/OL.40.003544.
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 μW to above 0.1 mW was measured.
我们报告了，据我们所知，首次对用于时域光谱（TDS）的光电导发射器的绝对太赫兹（THz）功率进行了测量。通过超薄膜型热释电（UPTF）探测器测量了经优化设计可用于 1550nm 飞秒脉冲激发的光电导产生的宽带太赫兹辐射。我们表明，由于 UPTF 两侧的特殊导电电极，该探测器在 100GHz 至 5THz 之间具有光谱平坦的透过率。其平坦的响应度允许在 PTB 的太赫兹探测器校准设施中使用可溯源至国际单位制（SI）的标准探测器进行校准。测量了范围从低于 1μW 到超过 0.1mW 的绝对太赫兹功率。
