Absorptance measurements of optical coatings: a round robin

Chow, Robert H.; Taylor, John R.; Wu, Zhouling; Boccara, Albert Claude; Broulik, Ulrike; Chen, Y.; Commandré, Mireille; Dijon, Jean; Fleig, Christoph; Giesen, Adolf; Fan, Zhengxiu; Kuo, P. K.; Lalezari, R.; Moncur, Kent; Obramski, H.J.; Pelle, Catherine; Reicher, David W.; Ristau, Detlev; Roche, P.; Steiger, Bernhard; Thomsen, Marshall; Gunten, Marc K. Von; Zhao, Qiang

doi:10.1117/12.425027

Cited by 3 publications

(1 citation statement)

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“…The reason is due to the complicated parameters of the optical system [11][12][13][14][15][16], such as the spot sizes of the pump laser and the probe laser on the sample surface, the distance between the beam waist of the probe beam and the sample surface, the relative position of the spots of the pump laser and the probe laser on the sample surface, the distance from the beam waist of the probe beam to the detector, and the lateral position and the size of the spatial filter placing in front of the detector. In addition, the time-dependence of the photothermal signals under laser irradiation has an important impact on the evaluation of the optical thin film coatings.…”

Section: Analysis Of Limiting Factorsmentioning

confidence: 99%

Development of an automated absorption measurement instrument (a “turn-key” system) for optical thin film coatings

Dong¹,

Chen²,

Wu³

2014

SPIE Proceedings

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In this paper, we present the progress in the development of an automated measurement instrument for optical thin film coatings. Based on the laser-induced surface thermal lensing effect, the instrument shows a measurement sensitivity of absorbance down to 10 ppb, and it provides user-friendly operation of the whole absorption measurement process. Compared with a typical bench-top system the instrument requires little special skills from the operators and is therefore more reliable and reproducible. The specific applications of this instrument include measuring weak absorption, detecting local absorption defects, and monitoring laser-coating-interaction dynamics. The measurement results show that such a high sensitive automated instrument is an effective diagnostic tool for the optimization of optical thin film coatings with desired optical properties.

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Section: Analysis Of Limiting Factorsmentioning

confidence: 99%

Development of an automated absorption measurement instrument (a “turn-key” system) for optical thin film coatings

Dong¹,

Chen²,

Wu³

2014

SPIE Proceedings

Self Cite

View full text Add to dashboard Cite

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Combined laser calorimetry and photothermal technique for absorption measurement of optical coatings

Blaschke

Ristau

2006

Appl. Opt.

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To the best of our knowledge, a combined sensitive technique employing both laser calorimetry and a surface thermal lens scheme for measuring absorption values of optical coatings is presented for the first time. Laser calorimetric and pulsed surface thermal lens signals are simultaneously obtained with a highly reflecting UV coating sample irradiated at 193 nm. The advantages and potential applications of the combined technique and the experimental factors limiting the measurement sensitivity are discussed.

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Temperature field analysis of TiO_2 films with high-absorptance inclusions

et al. 2010

Appl. Opt.

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To deduce the location of absorptive inclusions in thin films, temperature distributions in pure TiO(2) films and TiO(2) films with high-absorptance inclusions are analyzed based on temperature field theory. According to our theoretic simulations, the surface temperature rise increases when absorptive inclusions are incorporated into thin films and shows different values for different inclusions. With the increase of inclusion thickness, the surface temperature rise varies and has a maximum value. A potential method is presented to deduce the location of absorptive inclusion through calculating the surface temperature rise at two modulated frequencies, if it is possible to know in advance the inclusion material or to prejudge this from a thin-film deposition process.

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Absorptance measurements of optical coatings: a round robin

Cited by 3 publications

References 0 publications

Development of an automated absorption measurement instrument (a “turn-key” system) for optical thin film coatings

Development of an automated absorption measurement instrument (a “turn-key” system) for optical thin film coatings

Combined laser calorimetry and photothermal technique for absorption measurement of optical coatings

Temperature field analysis of TiO_2 films with high-absorptance inclusions

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