Operation of KrF and ArF tunable excimer lasers without Cassegrain optics

Grünefeld, Gerd; Schlüter, Harald; Andresen, Peter L.; Rothe, Erhard W.

doi:10.1007/bf01080951

Cited by 21 publications

(6 citation statements)

References 9 publications

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“…The laser used a "single-pass" configuration 12 producing approximately 90% linearly polarized light. The excimer laser output could be tuned from 247.8 nm to 248.8 nm, with typical pulse energies of 200 mJ in a pulse width of 13 ns.…”

Section: Experimental Setup and Methodologymentioning

confidence: 99%

<title>Optical measurement and visualization in high-pressure high-temperature aviation gas turbine combustors</title>

Hicks

Locke²,

Anderson

2000

SPIE Proceedings

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Section: Experimental Setup and Methodologymentioning

confidence: 99%

<title>Optical measurement and visualization in high-pressure high-temperature aviation gas turbine combustors</title>

Hicks

Locke²,

Anderson

2000

SPIE Proceedings

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“…The excited LIF signals of OH and O 2 cause cross-talk, easy to consider in H 2 /air flames. This cross-talk even vanishes in H 2 /air flames, if ASE is suppressed [22].…”

Section: Rayleigh Cross-section Of Ohmentioning

confidence: 96%

“…A linear intensified array or an intensified CCD detects the signals. The optical setup of the laser is optimized for minimal emission of broadband amplified spontaneous emission (ASE) [22]. ASE in excimer lasers results in a spectrally broad background radiation that excites various absorption lines of OH and O 2 [4].…”

Section: Rayleigh Cross-section Of Ohmentioning

confidence: 99%

Measurement of temperature and concentration in oxy-fuel flames by Raman/Rayleigh spectroscopy

Linow¹,

Dreizler²,

Janicka³

et al. 2002

Meas. Sci. Technol.

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For temperatures above ∼2500 K systematic errors arise in temperature and, depending on the algorithm used for data evaluation, in species concentration measured by Raman or Raman/Rayleigh spectroscopy. These systematic errors are independent of the specific experimental setup and excitation wavelength, but are caused by significant dissociation of the Raman active species into atoms and radicals. The aim of this paper is to develop a basic understanding of high temperature Raman/Rayleigh spectroscopy and to present a matched data post-processing. Methods are developed for an appropriate post-processing of data gained from oxy-fuel flames and can be viewed as an extension of conventional data evaluation strategies. These post-processing schemes presume the knowledge of the chemical performance of the system investigated, whereas in this study chemical equilibrium is used exemplarily. The focus is on single-shot measurement important for the investigation of turbulent flows. Experimental procedures using a KrF * excimer laser at 248.4 nm are scrutinized, and the measurement of the Rayleigh cross-section of OH at 248.4 nm necessary for data evaluation is presented.

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“…The KrF excimer laser is described elsewhere (Grü nefeld et al, 1996;Gu et al, 2000). The laser light has %1 cm À1 bandwidth, a % 13 ns pulse length, a % 1 mrad divergence, and was operated near 248.3 nm.…”

Section: Apparatusmentioning

confidence: 99%

Determination of Concentrations of Solutes in Gaseous, Liquid, and Supercritical Co₂by Means of UV Raman Spectroscopy

Tang

Gulari

Rothe

2005

Chemical Engineering Communications

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We measured compositions of high-pressure CO 2 solutions in vapor, liquid, and supercritical phases by means of UV-Raman spectra. Our goal was to investigate whether excimer-based Raman could quantitatively determine compositions of such solutions under high-pressure conditions. Some potential problems include (a) species that can absorb much, or all, of the UV-laser light, (b) fluorescence that might overwhelm the Raman signal, and (c) density gradients that would bend the laser beam. We studied two binary systems that were chosen to avoid such problems and that yielded quantitative composition analyses. These were (a) two-phase mixtures of CO 2 and n-pentane and (b) solutions of 1,1,1,2,3,4,4,5,5,5-decafluoropentane in CO 2 . We suggest some changes that could increase the usefulness of the method for future applications.

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Operation of KrF and ArF tunable excimer lasers without Cassegrain optics

Cited by 21 publications

References 9 publications

<title>Optical measurement and visualization in high-pressure high-temperature aviation gas turbine combustors</title>

<title>Optical measurement and visualization in high-pressure high-temperature aviation gas turbine combustors</title>

Measurement of temperature and concentration in oxy-fuel flames by Raman/Rayleigh spectroscopy

Determination of Concentrations of Solutes in Gaseous, Liquid, and Supercritical Co₂by Means of UV Raman Spectroscopy

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Operation of KrF and ArF tunable excimer lasers without Cassegrain optics

Cited by 21 publications

References 9 publications

<title>Optical measurement and visualization in high-pressure high-temperature aviation gas turbine combustors</title>

<title>Optical measurement and visualization in high-pressure high-temperature aviation gas turbine combustors</title>

Measurement of temperature and concentration in oxy-fuel flames by Raman/Rayleigh spectroscopy

Determination of Concentrations of Solutes in Gaseous, Liquid, and Supercritical Co2by Means of UV Raman Spectroscopy

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Determination of Concentrations of Solutes in Gaseous, Liquid, and Supercritical Co₂by Means of UV Raman Spectroscopy