Title :
Repeatability of absolute terahertz power measurement using a sensitive calorimeter
Author :
Iida, Hiroyuki ; Kinoshita, Moto ; Amemiya, Kuniaki ; Shimada, Yusuke
Author_Institution :
AIST, Nat. Metrol. Inst. of Japan, Tsukuba, Japan
Abstract :
In this paper, we report the repeatability of calorimetric measurement of absolute terahertz (THz) power at room temperature. Highly sensitive measurement at a sub-microwatt level was performed by using a calorimeter based on an isothermal temperature-control technique. The experiment was demonstrated at 1 THz using a photomixer as a THz source. Type A uncertainty in repeatability was evaluated to be 2.4% for five repetitions at an incident power of 0.81 μW. A very small drift of 30 pW/s was evaluated as well.
Keywords :
calorimeters; power measurement; terahertz wave detectors; THz power; THz source; absolute terahertz power measurement repeatability; calorimetric measurement; frequency 1 THz; isothermal temperature-control technique; photomixer; power 0.81 muW; sensitive calorimeter; sub-microwatt level; temperature 293 K to 298 K; Heating; Measurement by laser beam; Power measurement; Semiconductor device measurement; Temperature measurement; Temperature sensors; Uncertainty;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956135
