Absolute terahertz power measurement of a time-domain spectroscopy system.
Opt Lett
; 40(15): 3544-7, 2015 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-26258353
ABSTRACT
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.
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01-internacional
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MEDLINE
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En
Ano de publicação:
2015
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Article