Journal ArticleDOI
Highly efficient supersonic chemical oxygen — iodine laser with a chlorine flow rate of 10 mmol s-1
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TLDR
In this article, an experimental parametric investigation was made of a compact supersonic chemical oxygen (SOCO) laser, which was increased by displacing the point where iodine vapour was added to singlet oxygen from the subsonic to the transonic region of gas flow and by cooling of nitrogen.Abstract:
An experimental parametric investigation was made of a compact supersonic chemical oxygen — iodine laser. The output power of the laser was increased by displacing the point where iodine vapour was added to singlet oxygen from the subsonic to the transonic region of gas flow and by cooling of nitrogen. The output power was 200 W for a Mach number 1.5 in the cavity when the chlorine flow rate was 10 mmol s-1. An increase of the flow rates of all the gases and of the pressure in the singlet-oxygen generator by a factor of 1.6 resulted, when the other conditions were kept constant, in a proportional increase in the laser output power. An estimate of the chemical efficiency was in good agreement with the experimental value of 22%.read more
Citations
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Journal ArticleDOI
Performance of a high-efficiency 5-cm gain length supersonic chemical oxygen-iodine laser
TL;DR: The Air Force Phillips Laboratory has developed a small-scale supersonic chemical oxygen-iodine laser (COIL) test stand (VertiCOIL), which demonstrated an overall chemical efficiency of nearly 27%, one of the highest chemical efficiencies ever achieved by a COIL as discussed by the authors.
Journal ArticleDOI
Output Power Enhancement of a Chemical Oxygen-Iodine Laser by Predissociated Iodine Injection
Masamori Endo,Daichi Sugimoto,Hideo Okamoto,Kenzo Nanri,Taro Uchiyama,Shuzaburo Takeda,Tomoo Fujioka +6 more
TL;DR: In this paper, the output power enhancement of a chemical oxygen-iodine laser (COIL) by an injection of predissociated iodine was studied, and a low-pressure transonic mixing scheme with a grid nozzle array was developed.
Journal ArticleDOI
High-efficiency operation of chemical oxygen-iodine laser using nitrogen as buffer gas
Masamori Endo,Syoji Nagatomo,Shuzaburo Takeda,Marsel V. Zagidullin,V D Nikolaev,H. Fujii,Fumio Wani,Daichi Sugimoto,Katsuhiko Sunako,K. Nanri,Tomoo Fujioka +10 more
Abstract: High-efficiency operation of supersonic chemical oxygen-iodine laser (COIL) with an advanced jet-type singlet oxygen generator using nitrogen as buffer gas was demonstrated. Laser output was remarkably increased when buffer gas was cooled with liquid nitrogen. The effects of buffer gas temperature on the characteristics of the oxygen-iodine laser medium was discussed. A net chemical efficiency of 23.4% was obtained at 405 W when the chlorine molar flow rate was 19 mmol/s.
Journal ArticleDOI
Results of small-signal gain measurements on a supersonic chemical oxygen iodine laser with an advanced nozzle bank
V D Nikolaev,Marsel V. Zagidullin,Michael I. Svistun,Brian T. Anderson,R. F. Tate,G.D. Hager +5 more
TL;DR: In this paper, high-resolution diode laser spectroscopy has been used to probe the gain in the active medium formed by an advanced supersonic chemical oxygen iodine laser (COIL), ejector nozzle bank.
Journal ArticleDOI
High-performance chemical oxygen-iodine laser using nitrogen diluent for commercial applications
David L. Carroll,D. M. King,L. Fockler,D. Stromberg,Wayne C. Solomon,L.H. Sentman,C.H. Fisher +6 more
TL;DR: In this article, a chemical oxygen-iodine laser (COIL), the VertiCOIL device, was transferred from the Air Force Research Laboratory (AFRL) to the University of Illinois at Urbana-Champaign (UIUC) and made operational.
References
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Journal ArticleDOI
Gain Saturation and Output Power of Optical Masers
TL;DR: In this paper, an approximate expression for the power output of a gas maser oscillating simultaneously at many longitudinal cavity resonances, based on the assumption that the gain saturates independently at each frequency.
Journal ArticleDOI
Excitation of iodine by singlet molecular oxygen. Part 2.—Kinetics of the excitation of the iodine atoms
R. G. Derwent,B. A. Thrush +1 more
TL;DR: In this article, it was shown that the reaction of atomic iodine in the gas phase by singlet molecular oxygen involves the following reactions: I + O2(1Δ) = I*+ O 2(3∑) + hν(3), O 2 (1∑)-O 2 (3 ∑)+hν(4), I* + O 2((1)-O(2)-O2(3) + o 2(1−1−2), I *+ O(3−O 2 −1−O(3)-
Proceedings ArticleDOI
Chemically pumped oxygen-iodine laser
TL;DR: The present status of the chemical oxygen-iodine laser is discussed in this paper, where the pertinent processes occurring in the chemical O2 generator, the O2(1Delta) transport region, and the nozzle are reviewed.
Journal ArticleDOI
Power optimization of small-scale chemical oxygen-iodine laser with jet-type singlet oxygen generator
TL;DR: In this article, power optimization of a 5-cm gain length chemical oxygen-iodine laser (COIL) energized by a jet-type singlet oxygen generator (JSOG) is presented.
Journal ArticleDOI
Oxygen—iodine laser with a drop-jet generator of O2(1Δ) operating at pressures up to 90 Torr
TL;DR: In this paper, the operation of a chemical oxygen-iodine laser with a drop-jet generator of singlet oxygen, operating at pressures up to 90 Torr, was demonstrated.