Two-Directional CW THz Wave Generation System by Pumping With a Single Fiber Amplifier of Near-IR Lasers

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...

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Published in:IEEE photonics technology letters 2009-02, Vol.21 (4), p.260-262
Main Authors: Tanabe, T., Ragam, S., Oyama, Y., Sasaki, T., Nishizawa, J.-i., Ohkado, M., Yamada, N.
Format: Article
Language:English
Subjects:
Amplifiers
Beams (radiation)
Continuous-wave (CW)
Crystal surfaces
Crystals
Diode lasers
fiber amplifier (FA)
Fiber lasers
Fibers
Frequency
GaP
Laser beams
Laser excitation
Lasers
Optical fiber amplifiers
Optical surface waves
phase matching
Phonons
Pump lasers
Pumping
Surface emitting lasers
terahertz (THz)
Wave generation
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cited_by cdi_FETCH-LOGICAL-c395t-63259de2d9f60bea375f440d938fe05b01777e2131b1234eb7912f3e109983403
cites cdi_FETCH-LOGICAL-c395t-63259de2d9f60bea375f440d938fe05b01777e2131b1234eb7912f3e109983403
container_end_page 262
container_issue 4
container_start_page 260
container_title IEEE photonics technology letters
container_volume 21
creator Tanabe, T.
Ragam, S.
Oyama, Y.
Sasaki, T.
Nishizawa, J.-i.
Ohkado, M.
Yamada, N.
description 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.
doi_str_mv 10.1109/LPT.2008.2010716
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source IEEE Electronic Library (IEL) Journals
subjects Amplifiers
Beams (radiation)
Continuous-wave (CW)
Crystal surfaces
Crystals
Diode lasers
fiber amplifier (FA)
Fiber lasers
Fibers
Frequency
GaP
Laser beams
Laser excitation
Lasers
Optical fiber amplifiers
Optical surface waves
phase matching
Phonons
Pump lasers
Pumping
Surface emitting lasers
terahertz (THz)
Wave generation
title Two-Directional CW THz Wave Generation System by Pumping With a Single Fiber Amplifier of Near-IR Lasers
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