Generation of atomic iodine via fluorine for chemical oxygen–iodine laser

Jirásek, Vı́t; Špalek, Otomar; Čenský, Miroslav; Picková, I.; Kodymová, Jarmila; Jakubec, Ivo

doi:10.1016/j.chemphys.2007.02.023

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…Much of this work has been conducted by Kodymova, Spalek and co-workers [72][73][74][75][76]. To date the reactions (27) and (28) www.lpr-journal.org have been examined.…”

Section: Iodine Dissociationmentioning

confidence: 99%

Recent advances in the development of discharge‐pumped oxygen‐iodine lasers

Heaven

2010

Laser & Photonics Reviews

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Chemical oxygen-iodine lasers are unique in their ability to generate high-power beams with near diffraction limited beam quality. The operating wavelength, 1.315 μm is readily transmitted by the atmosphere and compatible with fiber optics beam delivery systems. However, applications of the laser are severely limited by logistical problems associated with the complex chemistry used to power the device. Electrical or microwave discharge excitation of oxygen-iodine lasers offers an attractive alternative that eliminates the chemical power generation problems and has the possibility of closedcycle operation. A discharge oxygen-iodine laser was first demonstrated in 2005. Since that time the power of the device has been improved by a factor of 400 and much has been learned concerning the physics and chemistry of the discharge driven system. Although our current understanding of the chemical kinetics is incomplete, parametric studies of laser performance show considerable promise for further scaling. This article reviews the basic principles of the discharge oxygen iodine laser, summarizes the most recent advances, and outlines some of the unresolved questions regarding the production and removal of excited species in the gas flow.

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“…Much of this work has been conducted by Kodymova, Spalek and co-workers [72][73][74][75][76]. To date the reactions (27) and (28) www.lpr-journal.org have been examined.…”

Section: Iodine Dissociationmentioning

confidence: 99%

Recent advances in the development of discharge‐pumped oxygen‐iodine lasers

Heaven

2010

Laser & Photonics Reviews

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“…*schmiedb@fzu.cz; phone +420-266052629; fax +420-286890265; www.fzu.cz The chemical way of atomic iodine generation for COIL was suggested and theoretically and experimentally tested in our laboratory. [2][3][4][5] The chemical methods produce sufficient concentrations of I atoms. However, they suffer from chemicals seriously quenching O 2 ( 1 ∆ g ) or from very high reaction temperature.…”

Section: Introductionmentioning

confidence: 99%

“…The operation of COIL or DOIL imposes the following main requirements on the atomic iodine generator: (1) a high yield of atomic iodine, (2) a low temperature, (3) a sufficiently high pressure to inject produced iodine into the laser cavity and (4) a low quenching rate of O 2 ( 1 ∆ g ) and I( 2 P 1/2 ) by reactants and reaction products. Two methods of atomic iodine for COIL/DOIL were investigated till now, a chemical way [2][3][4][5] and electric discharge way [6][7][8][9][10][11][12][13][14][15][16][17] (plasma-chemical way). *schmiedb@fzu.cz; phone +420-266052629; fax +420-286890265; www.fzu.cz The chemical way of atomic iodine generation for COIL was suggested and theoretically and experimentally tested in our laboratory.…”

Section: Introductionmentioning

confidence: 99%

RF discharge generation of I atoms in CH 3 I and CF 3 I for COIL/DOIL

et al. 2008

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A cw/pulsed radiofrequency discharge coupled by electrodes in coaxial arrangement was used to dissociate iodine atoms from CH 3 I or CF 3 I molecules diluted in a carrier gas (a mixture of Ar and He). The discharge chamber was arranged directly inside an iodine injector (made of aluminum) to minimize the recombination of generated atomic iodine and enabling an increased assistance of UV light for a photo-dissociation enhancement of I atoms production. The effluent of the discharge chamber/iodine injector was injected into the flow of N 2 downstream the nozzle throat. Measurements of I atoms concentration distribution at different distances from the injection and in two directions across cavity were done by means of absorption measurements at the wavelength of 1315 nm. Dependences of atomic iodine concentration on main RF discharge parameters and flow mixing conditions were measured. This novel method could be an alternative to the chemical generation of atomic iodine and also an efficient alternative to other electric discharge methods of I atoms generation for chemical oxygen-iodine laser (COIL) and discharge oxygen-iodine laser (DOIL).

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