High power uv noble-gas-halide laserf

Hoffman, James M.; Hays, A. K.; Tisone, G. C.

doi:10.1063/1.88813

Cited by 149 publications

(10 citation statements)

References 9 publications

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“…The rare-gas dimers have long been known [l-81. Lasers have been developed based on both the rare-gas dimers and rare-gas-halogen dimers [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Chemistry in mixtures of Kr with Ar and He illuminated with Kr resonance radiation

Young¹

1982

Int J of Chemical Kinetics

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The formation and destruction of excited rare-gas dimers have been studied using resonance optical excitation of high-pressure gas mixtures containing Kr. From an analysis of the resulting emission, 19 reaction rate coefficients have been inferred. It is concluded that atom-atom interchange processes play a major role in rare-gas eximer formation, and that stepwise relaxation down the eximer vibrational ladder is less important than multistep relaxation due to atom-atom exchange in the excited eximer.Of the 29 reactions listed in Table I and the 23 reactions listed in Table I1 which could occur in mixtures of Kr with Ar or He, reactions (l), (3) + (4), and (18) have been measured by Turner [32] (as 1.3 X and 7.6 X in s-l, cm3/s, and cm6/s, as appropriate), while Hughes' has measured ky, kq, and k17 (5.3 X lo6, 5.5 X This paper describes spectroscopic measurements on mixtures of Kr and other gases when this mixture is excited by the 123.6-nm resonance line of Kr from an optically thick source. These measurements are interpreted to give the reaction rates of reactions (relative to the reaction rates of reactions Hughes [31] has measured k7 to be 5.3 X lo6 sl, k3 + kq = 5.5 X lo-?' , and h17 = 1.75 X 108. 4 X 1.8 X lo8).

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“…The rare-gas dimers have long been known [l-81. Lasers have been developed based on both the rare-gas dimers and rare-gas-halogen dimers [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Chemistry in mixtures of Kr with Ar and He illuminated with Kr resonance radiation

Young¹

1982

Int J of Chemical Kinetics

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“…19,20 It was not until 1981 when an argon-fl uoride excimer laser (193 nm) was fi red on organic tissue when Srinivasan, Wynne, and Blum, who were researchers at IBM, made an incision in the leftover cartilage of a turkey from Thanksgiving dinner and found no evidence of damage to the surrounding tissue unlike the Figure 7. The argon-fl uoride excimer laser was developed in 1976.…”

Section: Excimer Lasermentioning

confidence: 99%

The History of LASIK

Reinstein¹,

Archer²,

Gobbé³

2012

J Refract Surg

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Keratomileusis, brainchild of Jose I. Barraquer Moner, was conceived and developed as the first stromal sculpting method to correct refractive error in 1948. The word "keratomileusis" literally means "sculpting" of the "cornea." Barraquer's first procedures involved freezing a disc of anterior corneal tissue before removing stromal tissue with a lathe. Over the years, the procedure continued to develop, first through the Barraquer-Krumeich-Swinger non-freeze technique where tissue was removed from the underside of the disc by a second pass of the microkeratome. In-situ keratomileusis was later developed by passing the microkeratome a second time directly on the stromal bed. The procedure became known as automated lamellar keratoplasty with the invention of an automated microkeratome and was further refined by replacing the disc without sutures and later by stopping the microkeratome before the end of the pass to create a hinged flap, as first demonstrated in 1989. The history of the excimer laser dates back to 1900 and the quantum theory, eventually leading to the discovery that 193-nm ultraviolet excimer laser pulses could photoablate tissue without thermal damage. Ultrastructural and wound healing studies confirmed that large area ablation could be performed in the central cornea. This was described as photorefractive keratectomy in 1986 and the first sighted eyes were treated in 1988. An excimer laser was first used to sculpt from the stromal bed under a hinged flap created manually using a trephine and scalpel in 1988. The incorporation of a microkeratome in 1990 finally led to laser in situ keratomileusis-LASIK-as we know it today.

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“…instrumental factors, and on the properties of the ample.^'-^^ In order to prevent or at least minimize edge effects from disturbing the profile, the ion beam was rastered over a large area (diameter 200-500 pm) while the analyzed area, viewed by the detector, was kept small relative to the bombarded area by diaphragming the SI beam at 15 pm diameter. [28][29][30] Also, constant primary beam intensity is necessary for obtaining a good proportionality between sputter time and depth. This was obtained easily by stabilizing the ion source for about 1 h and by applying a constant gas pressure of 1.5 x Torr.…”

Section: Bulk Analysis Of the Coatingmentioning

confidence: 99%

SIMS study of a 55% AlZn alloy coating for corrosion protection of steel wire products

Craen

Adams

Haemers

1982

Surface & Interface Analysis

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Secondary ion mass spectrometry with a Cameca ion microscope was used to study the surface and in-depth composition of a 55 wt ' / ' Al-Zn coating on steel wire. Several surface contaminants of the coating (C, Na, Mg, F, C1, K, Ca, Mn and Fe) were identified and the spatial distribution of some of them and of the coating components Al, Si and Zn were obtained. The dendritic-interdendritic structure of the Al-Zn coating was observed using a secondary ion imaging facility. The distribution at the surface of the coating constituents Na and CI, C and A1 and Mn and Fe were strongly correlated. Quantitative analysis showed that the Mn and Fe surface concentrations were some hundreds and some thousand p.p.m. wt, respectively.

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High power uv noble-gas-halide laserf

Cited by 149 publications

References 9 publications

Chemistry in mixtures of Kr with Ar and He illuminated with Kr resonance radiation

Chemistry in mixtures of Kr with Ar and He illuminated with Kr resonance radiation

The History of LASIK

SIMS study of a 55% AlZn alloy coating for corrosion protection of steel wire products

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