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We proposed a fiber-based, asynchronous optical sampling THz time-domain spectroscopy system by combination of mode-locked Er-doped fiber lasers and photoconductive antennas. The proposed system will become a fast, compact, alignment-free, robust, and flexible apparatus without any mechanical moving parts.
We developed a stabilized laser source for high-precision, asynchronous optical sampling terahertz time-domain spectroscopy, in which individual mode-locked frequencies in the two lasers and the frequency difference between them are stabilized by two independent laser-control systems. We further applied it for THz spectroscopy of water vapor.
We report a terahertz frequency-comb technique for high-accuracy, high-resolution terahertz spectroscopy by combination of two mode-locked-frequency-stabilized femtosecond lasers and multi-frequency-heterodyning photo conductive detection.
We demonstrated real-time, line-field terahertz time-domain spectroscopic (THz-TDS) imaging of a moving object by combined use of electro-optical time-to-space conversion and its one-dimensional imaging. The pixel rate of the proposed system is reached to 2,320 pixel/sec, which is much faster than those of conventional THz-TDS imaging systems.
We propose a terahertz (THz) frequency-comb technique for high-accuracy, high-resolution THz spectroscopy, based on multi-frequency-heterodyning (MFH) photoconductive detection using two femtosecond optical frequency combs with slightly mismatched frequency spacing.
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