Continuous-Wave Frequency-Tunable Terahertz-Wave Generation From GaP

Continuous-Wave Frequency-Tunable Terahertz-Wave Generation From GaP

Continuous-wave (CW) single-frequency terahertz (THz) waves were generated using difference-frequency generation via excitation of phonon-polaritons in GaP. The two pump sources were an external cavity laser diode (LD) and an LD-pumped Nd : YAG laser. The power density of the latter beam was enhance...

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Veröffentlicht in:IEEE photonics technology letters 2006-10, Vol.18 (19), p.2008-2010
Hauptverfasser: Nishizawa, J., Tanabe, T., Suto, K., Watanabe, Y., Sasaki, T., Oyama, Y.
Format: Artikel
Sprache:eng
Schlagworte:
Amplifiers
Beams (radiation)
Continuous-wave (CW)
Density
Diode lasers
Fiber lasers
Frequency
frequency-tunable
GaP
Holes
Laser beams
Laser excitation
Neodymium
Optical fiber amplifiers
phase matching
phonon-polariton
Power amplifiers
Pump lasers
Pumps
Semiconductor lasers
Stimulated emission
terahertz (THz)-wave
Wavelengths
YAG lasers
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Zusammenfassung:Continuous-wave (CW) single-frequency terahertz (THz) waves were generated using difference-frequency generation via excitation of phonon-polaritons in GaP. The two pump sources were an external cavity laser diode (LD) and an LD-pumped Nd : YAG laser. The power density of the latter beam was enhanced by using a ytterbium-doped fiber amplifier. The two incident beams were focused to near the wavelength of THz waves. This optical alignment enabled us to generate frequency-tunable CW THz waves in the 0.69-2.74 THz range. With a fixed angle between the pump beams, we obtained a frequency bandwidth as large as 600 GHz
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2006.882278