Title :
Characterization of Golay detector for the absolute power measurement of terahertz radiation
Author :
Yingxin Wang ; Ziran Zhao ; Zhiqiang Chen ; Linghui Wang
Author_Institution :
Dept. of Eng. Phys., Tsinghua Univ., Beijing, China
Abstract :
The responsivity of a Golay cell detector for continuous-wave 2.52 THz radiation is measured under the modulation frequency from 2 to 50 Hz. Theoretical analysis of the detector output signal is performed by modeling the detection process as a response to a sequence of rectangular pulses. Calibration of the detector with different input powers is achieved by using a thermopile calorimeter as the reference. Our work provides experimental evidence for the power measurement of terahertz radiation with a calibrated Golay detector.
Keywords :
calibration; calorimeters; power measurement; terahertz wave detectors; thermopiles; Golay cell detector; calibration; continuous wave radiation; frequency 2 Hz to 50 Hz; frequency 2.52 THz; power measurement; rectangular pulse sequence; responsivity measurement; terahertz radiation; thermopile calorimeter; Calibration; Choppers (circuits); Detectors; Frequency measurement; Frequency modulation; Power measurement;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6380076
