Absolute Intensity Measurements of CW GHz and THz Radiation Using Electro-Optic Sampling

We report on traceable and spatially resolved intensity measurements of continuous wave (CW) radiation at 100 GHz using laser-based electro-optic (EO) sampling. Traceability of the laser-based setup is achieved by comparison of the EO measurements with measurements using a calibrated radiometer. The...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2015-06, Vol.64 (6), p.1734-1740
Main Authors: Yuqiang Deng, Fuser, Heiko, Bieler, Mark
Format: Article
Language:English
Subjects:
Absolute intensity measurements
Antenna measurements
Crystals
electro-optic (EO) sampling
Frequency measurement
Measurement by laser beam
Measurement uncertainty
Radiometry
terahertz (THz) metrology
Uncertainty
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Summary:We report on traceable and spatially resolved intensity measurements of continuous wave (CW) radiation at 100 GHz using laser-based electro-optic (EO) sampling. Traceability of the laser-based setup is achieved by comparison of the EO measurements with measurements using a calibrated radiometer. The uncertainty budget of the EO measurements is discussed in detail. Although we just perform intensity measurements at ~100 GHz, the EO setup can be used for characterization of CW sources over a very broad frequency range from a few gigahertz to ~2.5 THz.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2014.2375692