Phillips Laboratory COIL technology overview

Truesdell, Keith A.; Lamberson, Steven E.; Hager, Gordon D.

doi:10.2514/6.1992-3003

Cited by 34 publications

(14 citation statements)

References 9 publications

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“…Since the rotating disk generator's invention, research groups in such diverse countries as the United States [25][26][27], Germany [28], China [29], and India [30] have built lasers using them. The typical performance of the rotating disk generator is a yield of 40-50% with a utilization of 90% or better as shown in Table 2.…”

Section: Wetted-wallmentioning

confidence: 99%

Singlet oxygen generators - the heart of chemical oxygen iodine lasers: past, present, and future

Hewett

2008

SPIE Proceedings

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Since the initial demonstration of chemical oxygen iodine lasers in 1977, researchers have realized that the heart of the COIL system is the singlet oxygen generator. This drives the performance of the system in terms of output power, mass efficiency, engineering complexity, reliability and maintainability. For this reason the singlet oxygen generator has been the focus of intense research and development efforts over the last 30 years. This paper reports on the history of singlet oxygen generators -starting with the simple sparger design used in the initial COIL demonstration and ending with current jet or droplet generators used in laboratories around the world. The relative performance of the different generator types will naturally lead to performance goals for the research efforts of the future.

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Section: Wetted-wallmentioning

confidence: 99%

Singlet oxygen generators - the heart of chemical oxygen iodine lasers: past, present, and future

Hewett

2008

SPIE Proceedings

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“…An excellent summary of basic COIL operation and military COIL technological development is provided by Truesdell et a!. [8]. Meanwhile, research towards making COIL an industrial device began in the latter half of the 1980's [9].…”

Section: Introductionmentioning

confidence: 98%

“…Brief descriptions of COIL systems can be found in Refs 5 and 6; a detailed overview is presented in Ref. 8. Since its first demonstration, COIL technology has evolved and matured to a sophisticated state for military applications.…”

Section: Introductionmentioning

confidence: 99%

<title>Cutting performance of a chemical oxygen-iodine laser on aerospace and industrial materials</title>

et al. 2000

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A chemical oxygen-iodine laser (COIL) was used for cutting aluminum, titanium,inconel and copper plates. The laser was operated with a stable resonator having an intracavity aperture to produce a circular COIL beam with very few transverse modes. The multimode focal spot diameter was calculated to be 0.24 mm. The new aluminum cut was of particularly high kerf edge quality. These COIL cutting data are compared with an existing theoretical laser cutting model. Using thermophysical data for aluminum, titanium, inconel and copper, this theory agrees very well with the data. To test the versatility ofthe model, the effects of different assumptions are examined; different assumptions produced very little effect on model predictions at high cutting speeds and a small difference at very slow cutting speeds. Overall, the theoretical model provides good agreement with experiments for a wide variety of metals.

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“…(2) and (3) show that P increases with increasing rlmx. To estimate 7 7m.x it is necessary to know the spatial distributions of the gain g and gas temperature T across the flow at the optical axis of the resonator.…”

Section: (3)mentioning

confidence: 99%

“…Fig. 4b shows dependencies of g on n1 2 at y = 0 (flow centerline) and y = 0.5 cm. It is seen that the optimal value of n1 2 at the flow centerline is smaller than that at the off centerline location.…”

Section: Nozzle No 1 With Transonic Injection Of Iodinementioning

confidence: 99%

Gain and temperature in a slit nozzle supersonic chemical oxygen-iodine laser with transonic and supersonic injection of iodine

Rosenwaks

Barmashenko

Bruins

et al. 2002

Gas and Chemical Lasers and Intense Beam Applications III

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Phillips Laboratory COIL technology overview

Cited by 34 publications

References 9 publications

Singlet oxygen generators - the heart of chemical oxygen iodine lasers: past, present, and future

Singlet oxygen generators - the heart of chemical oxygen iodine lasers: past, present, and future

<title>Cutting performance of a chemical oxygen-iodine laser on aerospace and industrial materials</title>

Gain and temperature in a slit nozzle supersonic chemical oxygen-iodine laser with transonic and supersonic injection of iodine

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