An Efficient Pulsed CH 3 OH Terahertz Laser Pumped by a TEA CO 2 Laser

Autor:	Jiu Zhi-Xian, Miao Liang, Zuo Du-Luo, QI Chun-Chao, Cheng Zu-hai
Rok vydání:	2010
Předmět:	Materials science business.industry Terahertz radiation Far-infrared laser General Physics and Astronomy Laser Intensity (physics) law.invention Pulse (physics) Photomixing Wavelength Optics Co 2 laser law Optoelectronics business
Zdroj:	Chinese Physics Letters. 27:024211
ISSN:	1741-3540 0256-307X
Popis:	An efficient pulsed CH3OH terahertz (THz) laser pumped by a TEA CO2 laser is investigated experimentally. To improve photon conversion efficiency and THz laser energy, two cavity configurations of the TEA CO2 laser, which is external and semi-external, are evaluated. The pump intensities are about 4.7 MW/cm2 and 1.2 MW/cm2, respectively. Higher pump intensity and more stable single lines are obtained in the external cavity. For the 3.8 J pump energy of the 9P(16) transition in the external cavity, the maximum terahertz output energy with 570.5 μm wavelength at 160 Pa is 431 μJ. With a 6 J energy pulse in terms of a semi-external cavity, a 353 μJ terahertz emission (570.5 μm) is produced. The corresponding photon conversion efficiencies are 1.36% and 0.705%, increasing by a factor of about 2.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::df31de81f2f9c35fd9df24a541311a58 https://doi.org/10.1088/0256-307x/27/2/024211 Zobrazit plný text záznamu