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

fYear

2007

fDate

2-9 Sept. 2007

Firstpage

220

Lastpage

221

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICIMW.2007.4516469

Filename

4516469