Generation of tunable infrared radiation by stimilated electronic Raman scattering
Generation of tunable infrared radiation by stimilated electronic Raman scattering
A simple method of generating tunable infrared radiation based upon stimulated electronic Raman scattering from a tunable dye laser in alkali metal vapours, is described. The results of calculations of the expected tuning ranges in potassium and caesium vapour are presented. These results suggest that complete coverage of the 2 μm - 20 μm region should be possible with a 10 kW dye laser by Raman scattering to the first three excited S states in caesium vapour. More than 1000 cm -1 of tuning around 2.7 μm was obtained in potassium vapour, using a nitrogen-laser-pumped dye laser with a power of 15 kW. This Raman output was used to measure absorption spectra of carbon dioxide gas near 2.8 μm to illustrate the usefulness of the technique. A resolution of under 0.5 cm -1 was obtained. By using a high power dye oscillator/amplifier, capable of output powers up to 1 MW, a considerable portion of the 2 μm - 20 μm region was covered by Raman scattering in caesium vapour. Raman output was obtained from 2.5 μm - 4.75 μm, 5.7 μm - 8.6 μm and 11.7 μm - 15 μm, with a maximum output power of 25 kW, 7 kW and 2 kW respectively. The linewidth of the Raman radiation was found to vary between 0.3 cm -1 and 1.5 cm -1 depending upon the experimental conditions.
University of Southampton
1976
Wyatt, Richard
(1976)
Generation of tunable infrared radiation by stimilated electronic Raman scattering.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
A simple method of generating tunable infrared radiation based upon stimulated electronic Raman scattering from a tunable dye laser in alkali metal vapours, is described. The results of calculations of the expected tuning ranges in potassium and caesium vapour are presented. These results suggest that complete coverage of the 2 μm - 20 μm region should be possible with a 10 kW dye laser by Raman scattering to the first three excited S states in caesium vapour. More than 1000 cm -1 of tuning around 2.7 μm was obtained in potassium vapour, using a nitrogen-laser-pumped dye laser with a power of 15 kW. This Raman output was used to measure absorption spectra of carbon dioxide gas near 2.8 μm to illustrate the usefulness of the technique. A resolution of under 0.5 cm -1 was obtained. By using a high power dye oscillator/amplifier, capable of output powers up to 1 MW, a considerable portion of the 2 μm - 20 μm region was covered by Raman scattering in caesium vapour. Raman output was obtained from 2.5 μm - 4.75 μm, 5.7 μm - 8.6 μm and 11.7 μm - 15 μm, with a maximum output power of 25 kW, 7 kW and 2 kW respectively. The linewidth of the Raman radiation was found to vary between 0.3 cm -1 and 1.5 cm -1 depending upon the experimental conditions.
This record has no associated files available for download.
More information
Published date: 1976
Identifiers
Local EPrints ID: 462715
URI: http://eprints.soton.ac.uk/id/eprint/462715
PURE UUID: 3c591a82-7bb4-49a4-b21b-44c93c46c819
Catalogue record
Date deposited: 04 Jul 2022 19:44
Last modified: 04 Jul 2022 19:44
Export record
Contributors
Author:
Richard Wyatt
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics