Frequency Stabilized GaP Continuous-Wave Terahertz Signal Generator for High-Resolution Spectroscopy

Autor:	Jun-ichi Nishizawa, Tetsuo Sasaki, Tadao Tanabe
Rok vydání:	2014
Předmět:	Physics Signal generator Spectrometer business.industry Terahertz radiation Amplifier Physics::Optics Optical power Laser law.invention symbols.namesake law symbols Optoelectronics Continuous wave business Doppler effect
Zdroj:	Optics and Photonics Journal. :8-13
ISSN:	2160-889X 2160-8881
DOI:	10.4236/opj.2014.41002
Popis:	We constructed a GaP continuous-wave terahertz (CW-THz) signal generator based on different frequency generation that can tune automatically from 0.15 to 6.2 THz without mode-hopping. Independent frequency feedback control for the seed laser and power feedback control for the optical power amplifier realized higher accuracy and stability of the output THz-wave at the same time. After constructing THz spectrometer with the GaP CW-THz signal generator as a light source, we have confirmed frequency resolution to be 15 MHz by the measurement of the Doppler width of water vapor absorptions in vacuumed chamber, and frequency reproducibility to be within 5 MHz by comparing with absorption frequency data.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7f26a25755fa8a1601df374e51204d04 https://doi.org/10.4236/opj.2014.41002 Zobrazit plný text záznamu