Pump saturation in molecular far-infrared lasers

Journal Article · Fri Oct 01 04:00:00 EDT 1976 · IEEE J. Quant. Electron.; (United States)

DOI:https://doi.org/10.1109/JQE.1976.1069049· OSTI ID:7319739

Weiss, C O

Precise absorption measurements on vibration-rotation transitions pumping far-infrared (FIR) laser transitions in HCOOH, CH/sub 3/OH, CH/sub 3/I and CH/sub 3/F were carried out using a frequency-stabilized and intensity-controlled CO/sub 2/ laser. Linear absorption coefficients and saturation intensities as a function of pressure are obtained. With the help of a rate equation model it is concluded that within the pressure range relevant for cw FIR lasers the rate of deexcitation of pumped molecules is limited by rotational relaxation. For CH/sub 3/F, limitation by diffusion of excited molecules to the cell wall is observed.

• Research Organization: Physikalisch-Technische Bundesanstalt, Braunschweig, Ger.
• OSTI ID: 7319739
• Journal Information: IEEE J. Quant. Electron.; (United States), Journal Name: IEEE J. Quant. Electron.; (United States) Vol. QE-12:10; ISSN IEJQA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ALCOHOLS
ELECTROMAGNETIC RADIATION
ETHANOL
FLUORINATED ALIPHATIC HYDROCARBONS
GAS LASERS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROXY COMPOUNDS
INFRARED RADIATION
IODINATED ALIPHATIC HYDROCARBONS
LASERS
METHANOL
METHYL IODIDE
OPTICAL PUMPING
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC IODINE COMPOUNDS
RADIATIONS