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Rotary optical delay line (RODL) uses a rotating reflective surface that gives a linear delay length with respect to the rotation angle. High speed scanning of terahertz pulse up to 400 Hz was realized by using the RODL. Operation characteristics of the RODL in high speed scanning will be presented.
We present a fast measurement and real time monitoring of a pulsed terahertz signal generated by a femtosecond laser and a photoconductive antenna. Two types of high speed optical delay lines (ODLs) are considered: oscillating type and rotary type. The method to measure the amplitude of the retro-reflector in the oscillating optical delay line is proposed and the displacement of the retro-reflector...
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