Frequency-domain optical coherence tomography system in the terahertz region
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In this study, a frequency-domain optical coherence tomography (FD-OCT) system in the terahertz frequency range was developed. To generate tunable continuous-wave terahertz radiation, the outputs of two near-infrared external cavity diode lasers were mixed in an antenna-coupled photo-mixer. Using the FD-OCT system, tomographic profiling of the front and back surfaces of a high-resistivity silicon plate was realized.
This work was supported in part by the Terahertz Optics Project for Medical Applications led by Prof. J. Nishizawa, organized by the Ministry of Education, Culture, Sports, Science, and Technology of Japan. The authors profusely thank Mr. Takashi Inoue and Mr. Toru Nakashima for their contributions to the experiments.
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