Title :
A compact THz-TDS system for stable and quick measurements
Author :
Kitagishi, K. ; Sumida, K. ; Kurata, Y. ; Yoshida, S. ; Izutani, Y.
Author_Institution :
Otsuka Electron., Osaka
Abstract :
A compact system of THz time-domain spectroscopy (THz-TDS), equipped to a mode-locked Er-doped fiber laser, has been developed. It enables quick measurements with a delay stage at the speed higher than 1 mm/s with the position accuracy of 001 mum. The typical duration of the single measurement is shorter than 30 s. The frequency-domain spectral range is between 0.04 and 4 THz and the dynamic range is wider than 105. Its sample stage is adaptable for tablets, aqueous solutions, etc. For aqueous solutions, small-gap quartz cells have been designed and absorption spectra of the sample solution can be obtained in THz region similar to UV-Vis in spite of the strong absorbance of water.
Keywords :
fibre lasers; submillimetre wave spectra; submillimetre wave spectroscopy; THz time-domain spectroscopy; absorption spectra; compact THz-TDS system; compact system; frequency-domain spectral range; mode-locked Er-doped fiber laser; quick measurements; stable measurements; water absorbance; Amplifiers; Delay; Dipole antennas; Laser excitation; Lenses; Optical pulses; Photoconductivity; Spectroscopy; Time domain analysis; Ultrafast optics; THz time-domain spectroscopy; compact THz spectrometer; high-speed scan stage; small-gap quartz cells;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516469
