Laser calorimetric absorptance testing of samples with varying geometry

Balasa, Istvan; Jensen, Lars; Ristau, Detlev

doi:10.1117/12.2030273

Cited by 5 publications

(4 citation statements)

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“…The experimental results are determined at one wavelength (l = 632 nm). According to (10), the average absorptance (k) is 0.999928 (l = 632 nm). Thus, the absorptance of sloping bottom cavity is super high and uniform.…”

Section: Absorptance Measurement Resultsmentioning

confidence: 99%

“…To guarantee the low measurement uncertainty of ARCPR, the absorptance of TSI cavity should have a super-high absorptance more than 0.9999 and the measurement uncertainty should be <10 ppm. Besides, the uniformity of absorptance is another important performance of TSI cavity [10]. Most of absorptance measure methods use laser as optical source because of its stability [11].…”

Section: Introductionmentioning

confidence: 99%

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Correction of cavity absorptance measure method for cryogenic radiometer

Fang

Luo

et al. 2016

IET Science, Measurement & Technology

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Section: Absorptance Measurement Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correction of cavity absorptance measure method for cryogenic radiometer

Fang

Luo

et al. 2016

IET Science, Measurement & Technology

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“…Absorption of the F502 sample on 6.35 mm substrate and F504 sample on a 1 mm substrate was measured using laser calorimetry [29]. The absorption values were found equal to 66 ppm (F502 sample) and 76 ppm (F504 sample).…”

Section: Table 1 Cauchy Coefficients and Thermo-optic Parameters Of mentioning

confidence: 99%

Experimental and numerical study of the nonlinear response of optical multilayers

2017

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Dielectric multilayer coatings exhibiting steep reflectance in an extremely narrow transition zone, highly sensitive to any variations of layer refractive indices and therefore suitable for studying the nonlinear properties are produced and characterized. Increase of reflectance at growing intensity reveals the presence of the optical Kerr effect. A new method calculating intensity dependent spectral characteristics of multilayer optical coatings in the case of nonlinear interaction with high intensity laser pulses is developed. The method is based on the numerical solution of a boundary-value problem derived from the system of Maxwell equations describing the propagation of light through a multilayer system. The method opens a way to synthesis of optical coatings with predictable nonlinear properties. Comparison of our numerical modelling with experimental data enabled us to accurately determine the Kerr coefficients n of the widely-used thin-film materials TaO and NbO.

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“…further adjustments to recent developments in laser technology are subject of a second revised version of the laser calorimetry standard which is presently in the state of a Draft International Standard (DIS) and will probably be published in the upcoming year 2019. In the meantime, additional aspects in respect to the geometry of the specimens moved into the focus of current research activities [23]. Modern laser systems contain a variety of components with rectangular, rod shaped or even more complex geometries, which have to be qualified in respect to their absorption behavior.…”

Section: Laser Calorimetry According To Iso 11551mentioning

confidence: 99%

Standardization in Optics Characterization

Ristau¹

International Trends in Applied Optics

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An adapted quality management is a major prerequisite for the reliable production of optical components and coatings. Especially laser applications impose highest demands on modern optical systems and can be considered as a major pacemaker for the development of advanced quality management strategies. Therefore, most of the standardized concepts for the determination of the properties necessary for a comprehensive quality control, as for example losses and transfer functions as well as laser-induced damage thresholds or defect densities of optical surfaces, are based on laser systems. This contribution is intended to offer a brief review on the present status of optics characterization and the related standards often applied in the production of laser components. A selection of International Standards will be presented with focus on the determination of laser induced damage thresholds (ISO 21254), optical absorption (ISO 11551), and Total Scattering (ISO 13696). The corresponding measurement methods will be described and discussed before the background of recent developments in laser technology. Finally, some aspects of the future development and projects of international standardization activities will be discussed.

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Laser calorimetric absorptance testing of samples with varying geometry

Cited by 5 publications

References 0 publications

Correction of cavity absorptance measure method for cryogenic radiometer

Correction of cavity absorptance measure method for cryogenic radiometer

Experimental and numerical study of the nonlinear response of optical multilayers

Standardization in Optics Characterization

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