Frequency-agile terahertz-wave parametric oscillator in a ring-cavity configuration.
- Resource Type
- Article
- Authors
- Minamide, Hiroaki; Ikari, Tomofumi; Ito, Hiromasa
- Source
- Review of Scientific Instruments. Dec2009, Vol. 80 Issue 12, p123104. 5p. 1 Color Photograph, 2 Diagrams, 1 Graph.
- Subject
- *PARAMETRIC oscillators
*TERAHERTZ spectroscopy
*SPECTRUM analysis
*GLUCOSE
*FOURIER transforms
*SCIENTIFIC apparatus & instruments
- Language
- ISSN
- 0034-6748
We demonstrate a frequency-agile terahertz wave parametric oscillator (TPO) in a ring-cavity configuration (ring-TPO). The TPO consists of three mirrors and a MgO:LiNbO3 crystal under noncollinear phase-matching conditions. A novel, fast frequency-tuning method was realized by controlling a mirror of the three-mirror ring cavity. The wide tuning range between 0.93 and 2.7 THz was accomplished. For first demonstration using the ring-TPO, terahertz spectroscopy was performed as the verification of the frequency-agile performance, measuring the transmission spectrum of the monosaccharide glucose. The spectrum was obtained within about 8 s in good comparison to those of Fourier transform infrared spectrometer. [ABSTRACT FROM AUTHOR]