Abstract
Calibrating the absolute spectral responsivity is of great importance, because this guides the design and application of terahertz detectors. In this paper, we build a calibration system, and this system can be used to calibrate absolute spectral responsivity of terahertz detectors at a serial of frequencies such as 0.84, 1.63, 2.52, 4.25 THz et al. The key components of the system include a standard terahertz detector and a terahertz gas laser, and other components such as TPX lens and ultrasensitive voltmeter are also included. The calibration system was employed to calibrate a terahertz detector with the model of 12D-3S-VP produced by Gentec Inc., and the absolute spectral responsivity of 193.8 mV/W at 2.52 THz was obtained. The measurement uncertainty is analyzed to be 6.0%. This work not only offers method and system to terahertz detector calibration, but also contributes to high accuracy terahertz power measurement and terahertz device calibration.
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Wu, B., Wang, H., Wang, P., Zhang, P., Zhang, W., Ying, C. (2020). Absolute Spectral Responsivity Calibration of Terahertz Detector. In: Peng, Y., Dong, X. (eds) Proceedings of 2018 International Conference on Optoelectronics and Measurement. Lecture Notes in Electrical Engineering, vol 567. Springer, Singapore. https://doi.org/10.1007/978-981-13-8595-7_28
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DOI: https://doi.org/10.1007/978-981-13-8595-7_28
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