[8a-P02-1~16] 3.8 Terahertz technologies

[8a-P02-14] Correction of thermally induced phase shift in terahertz time-domain spectroscopy

〇Makoto Okano¹, Kota Suyama¹, Atsushi Wada¹, Satoshi Tanaka¹ (1.NDA)

Keywords:

Terahertz time-domain spectroscopy,Phase corrections

In terahertz time-domain spectroscopy (THz-TDS), the complex refractive index can be directly determined by simultaneously acquiring phase and amplitude. However, in fiber-based THz-TDS systems, temperature variations cause changes in optical path length, leading to phase shifts and preventing accurate determination of the complex refractive index. In this study, we developed a method to compensate for thermallly induced phase shifts. Through numerical simulations and experiments, we validated this method and successfully obtained the complex refractive index with high precision.