2010
DOI: 10.1364/ao.49.002417
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Enhanced surface thermal lensing for absorption evaluation and defect identification of optical films

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Cited by 9 publications
(7 citation statements)
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“…In the simulation, the radius of the pump beam is a ¼ 150 μm and the thermal diffusivity of the Cr film is k th ¼ 2:9 × 10 −5 m 2 =s, so the characteristic time is t c ¼ 0:193 ms calculated by Eq. (15). From Fig.…”
Section: Temporal Characteristicsmentioning
confidence: 97%
See 1 more Smart Citation
“…In the simulation, the radius of the pump beam is a ¼ 150 μm and the thermal diffusivity of the Cr film is k th ¼ 2:9 × 10 −5 m 2 =s, so the characteristic time is t c ¼ 0:193 ms calculated by Eq. (15). From Fig.…”
Section: Temporal Characteristicsmentioning
confidence: 97%
“…It has been successfully applied to many diverse areas, such as materials science [13], optical film coating defect inspection [14,15], thermophysical parameters measurement [16][17][18], subnanoliter measurement [19], spectroscopy [20,21], and microscopy [22]. Two types of TL techniques have been reported: mode-matched [23] and mode-mismatched [24] configurations.…”
Section: Introductionmentioning
confidence: 99%
“…5,6 Surface thermal lens technique, first reported by Kuo and Munidasa 7 and Satio et al, 8 has also been developed to be a highly sensitive photothermal technique and was widely used in absorptance and surface displacement measurements of optical components. [9][10][11][12][13] Due to the development of the mode-mismatched thermal lens configuration, 14,15 the sensitivity of surface thermal lens technique has been considerably improved. Moreover, the use of top-hat beam excitation, first proposed by Li et al 9 and late adopted by Astrath et al, 16,17 has further improved the sensitivity of surface thermal lens technique, with a maximum sensitivity enhancement factor of 2.…”
Section: Introductionmentioning
confidence: 99%
“…Currently, He-Ne laser operated at 633 nm is commonly used as the probe beam in almost all surface thermal lens or in general thermal lens experiments or instruments. [9][10][11][12][13]16,17,20 On the other hand, with the rapid development of highpower laser technique, 21 the absorption loss of optical laser components used in high-power laser systems becomes a crucial parameter due to the high sensitivity of the laserinduced damage threshold and thermal distortion to the absorption loss. The absorption of laser power by optical laser components causes temperature rise inside the laser components and results in thermal expansion (thermal distortion) and thermal stress or melting of the laser components.…”
Section: Introductionmentioning
confidence: 99%
“…The uniformity of optical coatings becomes more and more important as large-diameter optical devices are used widely. The photothermal deflection technique [4,5] and surface thermal lens technique [6,7] can be used in absorption uniformity measurement of optical thin films. The test accuracy and sensitivity need to be improved further.…”
Section: Introductionmentioning
confidence: 99%