16 November 2010 Output power enhancement of an amine-based all gas-phase iodine laser by addition of methane gas
Author Affiliations +
Proceedings Volume 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 77510T (2010); doi: 10.1117/12.880234
Event: 18th International Symposium on Gas Flow and Chemical Lasers and High Power Lasers, 2010, Sofia, Bulgaria
Abstract
Output power enhancement of an all gas-phase iodine laser (AGIL) by addition of hydrocarbon gases is studied. It is expected because hydrocarbon gases might scavenge Cl atoms, which are strong quencher of the upper state of the laser medium, I(2P1/2). In AGILs, suppression of the Cl atom concentration is the key to improving the efficiency of laser operation because Cl atoms are inherently generated by the self-annihilation of the energy donor, NCl(a1Δ). We found that the addition of CH4 gave the best results because of its high scavenging rate constant and inertness to I(2P1/2). An enhancement of 10% was observed in the output power when CH4 was added at a flow rate twice that of NCl3. On the other hand, when C2H4 or C2H2 were added at the same flow rate as that of CH4, the output power reduced despite their fast removal rate of Cl atoms. The reason for the reduced output power was that the unsaturated bonds scavenged not only the Cl atoms but also the H atoms, resulting in a low density of H atoms, and this decelerated the production of NCl(a1Δ). The observed laser characteristics could be reasonably explained by numerical model calculations.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Taizo Masuda, Tomonari Nakamura, Masamori Endo, "Output power enhancement of an amine-based all gas-phase iodine laser by addition of methane gas", Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 77510T (16 November 2010); doi: 10.1117/12.880234; https://doi.org/10.1117/12.880234
PROCEEDINGS
9 PAGES


SHARE
KEYWORDS
Chemical species

Chlorine

iodine lasers

Iodine

Gases

Hydrogen

Chemical lasers

RELATED CONTENT

A study on an all gas phase iodine laser based...
Proceedings of SPIE (February 21 2008)
The auto decomposition of NCl<sub>3< sub> as a source of...
Proceedings of SPIE (February 23 2006)
Kinetic studies of the autodecomposition of NCI3
Proceedings of SPIE (May 08 2007)
Advanced iodine lasers
Proceedings of SPIE (June 05 2003)

Back to Top