The new terahertz time-domain spectroscopy testing and imaging system introduced to the research institute is a product of Advantest Company, and its model is TAS7400TS. Advantest was established in Tokyo, Japan in 1954. Since its development, it has established branches in many countries around the world. Its main business is semiconductor and mechanical electronic services. The company has a high influence in the field of terahertz equipment. TAS7400TS is the company's flagship product for terahertz research.
        Terahertz is a light wave with a frequency in the 0.1-10THz frequency band in the spectrum. Because of its low energy, no damage to organic tissue, and a large amount of information, it can be used in many fields such as defense, communications, security, medicine, agriculture, etc. The world pays close attention to it, and the United States regards it as one of the top ten technologies in the future.
        TAS7400TS equipment is at the leading level in the domestic research field, it can be used for transmission spectrum detection, transmission imaging, reflection spectrum detection and reflection imaging. The device uses ultra-short femtosecond pulses as the excitation element, which has the advantages of fast response, wide bandwidth (0.1-5THz), stability, and compact device. And it has its own unique sampling method. Compared with traditional sampling methods, this method is faster, more flexible, lower adult, and the scanning speed is 200ms/scan.