1988
DOI: 10.1364/ol.13.000814
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Two-photon absorption at 248 nm in ultraviolet window materials

Abstract: Two-photon-absorption coefficients are measured for fused silica, LiF, and the alkali earth halides BaF(2), SrF(2), CaF(2), and MgF(2), using 0.7-psec, 248-nm pulses with intensities in the range (0.5-30) x 10(10) W/cm (2) . The conse-quences of these measurements in the design of high-brightness excimer lasers are discussed.

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Cited by 87 publications
(14 citation statements)
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“…1). Agreement with the value reported for transmission measurements at 1 O times higher intensity [2] is reasonable, considering that for similar materials, published data for the ps-and sub-ps-range vary by aboutone order ofmagnitude [2,3]. The absorption increase was completely reversible: whenever a series of irradiations was repeated with the same parameters several hours later, the data matched precisely.…”
Section: Two-photon Absorption Without Degradationsupporting
confidence: 88%
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“…1). Agreement with the value reported for transmission measurements at 1 O times higher intensity [2] is reasonable, considering that for similar materials, published data for the ps-and sub-ps-range vary by aboutone order ofmagnitude [2,3]. The absorption increase was completely reversible: whenever a series of irradiations was repeated with the same parameters several hours later, the data matched precisely.…”
Section: Two-photon Absorption Without Degradationsupporting
confidence: 88%
“…In all these cases, the band-gap is wider than twice the laser photon energy, making two-photon absorption impossible. Since thin samples (dz = 1-5mm) are investigated, the differential form of Beer's law may applied: in crystalline quartz (z-cut) at 248nm/ 150Hz dI=-aldz, (2) and from the measured absorptance A = -dill I = dz a the linear absorption coefficient a can be derived …”
Section: Constant Absorptionmentioning
confidence: 99%
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“…In addition to using these sources to seed large rare gas halide excimer amplifiers in the ultraviolet1'2, generation of wavelength tunable femtosecond laser sources in the UV and near-VUV region3 are practical for a number of applications including: subpicosecond UV kinetic spectroscop'5, laser generated target plasmas6, wide band gap semiconductors7, and insulator material dynamics. 8 For time resolved femtosecond pump-probe spectroscopy, often one relies on the absorption of a broadband probe continuum for the detection of a transient species spectral feature. Generally, the probe continuum is generated by an intense femtosecond source through a nonlinear process in a gas or condensed phase medium called supercontinuum generation.9 This paper describes a femtosecond pump-probe system useful for detection of photochemical UV transients.…”
Section: Introductionmentioning
confidence: 99%