Widely tunable coherent terahertz-wave generation using nonlinear optical effect

Kodo Kawase, Junichi Shikata, Manabu Sato, Tetsuo Taniuchi, Hiromasa Ito

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

By using room-temperature parametric oscillation of LiNbO3 pumped by a Q-switched Nd: YAG laser, a tunable terahertz-wave source in the range between 1 and 2 THz has been realized with a simple configuration. Since the terahertz wave is strongly absorbed inside the crystal and is affected by total internal reflection at the crystal edge, terahertz radiation outside the crystal has been difficult. A grating coupler and a prism coupler have resulted in wide tunability, high efficiency, and high spatial coherency. In this paper, the basic configuration of the optical source, various radiation characteristics, and the terahertz spectroscopic system using the present source are described.

Original languageEnglish
Pages (from-to)10-18
Number of pages9
JournalElectronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
Volume81
Issue number7
DOIs
Publication statusPublished - 1998 Jul

Keywords

  • Nonlinear optics
  • Parametric
  • Terahertz
  • Tunable spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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