Fiber-based, hybrid terahertz spectrometer using dual fiber combs.
We constructed a fiber-based, hybrid terahertz (THz) spectrometer having two working modes, asynchronous-optical-sampling THz time-domain spectroscopy (AOS-THz-TDS) and multiple-frequency-heterodyning THz comb spectroscopy (MFH-THz-CS), by use of dual fiber-laser-based frequency combs. A spectral range of 2THz and dynamic range of 100 was achieved at the single sweep measurement of 200ms in the AOS-THz-TDS mode, whereas the detailed structure of the THz frequency comb was clearly observed in the MFH-THz-CS mode. The spectrometer features compactness, robustness, flexibility, and cost effectiveness, in addition to high spectral resolution in rapid data acquisition, and has the potential to become a powerful tool for practical applications.
Yasui
Takeshi
T
Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho,Toyonaka, Osaka 560-8531, Japan. t-yasui@me.es.osaka-u.ac.jp
Nose
Masaki
M
Ihara
Atsushi
A
Kawamoto
Kohji
K
Yokoyama
Shuko
S
Inaba
Hajime
H
Minoshima
Kaoru
K
Araki
Tsutomu
T