Two-directional CW THz wave generation system by pumping with a single fiber amplifier of near-IR lasers

Tadao Tanabe, Srinivasa Ragam, Yutaka Oyama, Tetsuo Sasaki, Jun Ichi Nishizawa, Makoto Ohkado, Naoyuki Yamada

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We constructed a two-directional continuous-wave (CW) terahertz (THz) wave generation system with laser diode pumping. The generation method is based on difference frequency generation (DFG) of two near-infrared (NIR) lasers by excitation of phonon polaritons in a GaP crystal. The two NIR lasers for DFG are amplified simultaneously using one ytterbium-doped fiber amplifier (FA). Efficient beam overlapping of the NIR lasers was achieved on the GaP crystal surface. This system consists of a simple optical design with a single FA. Narrow linewidth CW THz waves, which are generated in two directions, can be applied to high-resolution spectroscopy.

Original languageEnglish
Pages (from-to)260-262
Number of pages3
JournalIEEE Photonics Technology Letters
Volume21
Issue number4
DOIs
Publication statusPublished - 2009 Feb 15
Externally publishedYes

Keywords

  • Continuous-wave (CW)
  • Fiber amplifier (FA)
  • GaP
  • Phase matching
  • Terahertz (THz)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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