Title :
THz time-domain spectroscopy beyond 4 THz using a sub-picosecond Yb-doped fiber laser system
Author :
Nagai, Masaharu ; Matsubara, Eiichi ; Ashida, M. ; Takayanagi, Jun ; Ohtake, H.
Author_Institution :
Grad. Sch. of Eng. Sci., Osaka Univ., Toyonaka, Japan
Abstract :
We performed THz pulse generation and detection beyond 4 THz by using a 1.04-μm Yb-doped fiber laser with a pulse duration of 480 fs. Owing to higher-order nonlinear processes in LiNbO3 crystals, THz pulses can be emitted with a bandwidth extending beyond the excitation pulse limitation. Emitted THz pulses are detected by using a stable sampling pulse that is temporally compressed by an optical fiber.
Keywords :
fibre lasers; lithium compounds; microwave photonics; nonlinear optics; optical pulse compression; optical pulse generation; optical pulse shaping; terahertz wave detectors; terahertz wave generation; terahertz wave spectra; ytterbium; LiNbO3; THz pulse detection; THz pulse generation; THz time-domain spectroscopy; excitation pulse limitation; higher-order nonlinear process; optical fiber; pulse duration; stable sampling pulse compression; subpicosecond Yb-doped fiber laser system; time 480 fs; wavelength 1.04 mum; Bandwidth; Crystals; Laser excitation; Lithium niobate; Optical fiber dispersion; Optical fibers; Surface emitting lasers;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956314
