GaP THz wave generator and THz spectrometer using Cr:Forsterite lasers

Ken Suto, Tetsuo Sasaki, Tadao Tanabe, Kyosuke Saito, Jun Ichi Nishizawa, Masahiko Ito

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


We have developed a type of THz wave generator that uses Cr:Forsterite lasers as the pump and signal sources for difference frequency generation in GaP (Cr:F source system). We confirmed the generation of THz waves in the frequency range from 0.3 to 7.5 THz, which is just similar to that obtained using the THz wave generator previously developed utilizing yttrium aluminum garnet and optical parametric oscillator (OPO) lasers (OPO source system). A peak output power of 100 mW was obtained from 1.2 to 5 THz when the power of the two input beams was 3 mJ each, similar to the OPO source system. A wide measurable frequency range from below 0.6 THz to over 6 THz was obtained by using the Cr:F source system as the light source of a spectrometer, which has the merits of simple structure, easy maintenance, and low cost compared with the OPO source system. Although the linewidth of the Cr:F source system is greater than that of the OPO source system, the THz spectrometer still has sufficient resolution for measuring solids or liquids at room temperature.

Original languageEnglish
Article number123109
Pages (from-to)1-3
Number of pages3
JournalReview of Scientific Instruments
Issue number12
Publication statusPublished - 2005
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation


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