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

doi:10.1109/LPT.2008.2010716

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

ENG - Materials Science

Research output: Contribution to journal › Article

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 language	English
Pages (from-to)	260-262
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	21
Issue number	4
DOIs	https://doi.org/10.1109/LPT.2008.2010716
Publication status	Published - 2009 Feb 15

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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Tanabe, T., Ragam, S., Oyama, Y., Sasaki, T., Nishizawa, J. I., Ohkado, M., & Yamada, N. (2009). Two-directional CW THz wave generation system by pumping with a single fiber amplifier of near-IR lasers. IEEE Photonics Technology Letters, 21(4), 260-262. https://doi.org/10.1109/LPT.2008.2010716

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

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.",

keywords = "Continuous-wave (CW), Fiber amplifier (FA), GaP, Phase matching, Terahertz (THz)",

author = "Tadao Tanabe and Srinivasa Ragam and Yutaka Oyama and Tetsuo Sasaki and Nishizawa, {Jun Ichi} and Makoto Ohkado and Naoyuki Yamada",

year = "2009",

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T1 - Two-directional CW THz wave generation system by pumping with a single fiber amplifier of near-IR lasers

AU - Tanabe, Tadao

AU - Ragam, Srinivasa

AU - Oyama, Yutaka

AU - Sasaki, Tetsuo

AU - Nishizawa, Jun Ichi

AU - Ohkado, Makoto

AU - Yamada, Naoyuki

PY - 2009/2/15

Y1 - 2009/2/15

N2 - 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.

AB - 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.

KW - Continuous-wave (CW)

KW - Fiber amplifier (FA)

KW - GaP

KW - Phase matching

KW - Terahertz (THz)

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