106-μm laser damage of thin film optical coatings: a round-robin experiment involving various pulse lengths and beam diameters

Guenther, Karl H.; Humpherys, Thomas; Balmer, J. E.; Bettis, J. R.; Casparis, E.; Ebert, Johannes; Eichner, M.; Guenther, Arthur H.; Kiesel, Eberhard; Kuehnel, R.; Milam, D.; Ryseck, W.; Seitel, S. C.; Stewart, Andrew; Weber, Horst; Weber, H. P.; Wirtenson, G.R.; Wood, R. M.

doi:10.1364/ao.23.003743

Cited by 44 publications

(2 citation statements)

References 11 publications

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“…Àn , with n between 1 and 2. 18) However, the detailed dependence of LIDT with beam diameter is very difficult to predict because it depends on the defect density at each fluence. 12) The nature of the critical defects causing damage in our experiment is not well established but the fact that the threshold values are almost the same for single crystals as for the ceramics suggests that they must be present in both single crystals and ceramics samples.…”

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confidence: 99%

Laser Damage Threshold of Ceramic YAG

Bisson

Feng

Shirakawa

et al. 2003

Jpn. J. Appl. Phys.

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Bulk laser damage thresholds of doped and undoped ceramic Y 3 Al 5 O 12 (YAG) materials are reported. These materials were found to resist 100 J/cm 2 , 4-ns pulses at 1.064 mm wavelength. Single-crystal YAG materials of similar composition yielded similar damage thresholds. Hence, ceramic microstructure does not contribute to lower damage threshold. Beam-size dependence of damage threshold fluence was also studied by repeating the experiment using a lens with a longer focal length. The evolution of damage probability with laser fluence was found to strongly depend on the beam diameter; however, damage threshold was not found to vary significantly with beam diameter.

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confidence: 99%

Laser Damage Threshold of Ceramic YAG

Bisson

Feng

Shirakawa

et al. 2003

Jpn. J. Appl. Phys.

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“…44 To measure LDT we used "R on 1" method where multiple laser shots are fired at a site with ramped increase of intensity of every shot until damage occurs to the spot. 45 A Quanta Nd: YAG laser having 7 ns pulse width and variable pulse energy was used for LDT measurements on the (100) plate of LAP crystal. The time interval between successive laser pulses was ∼20 s to allow for thermal energy to dissipate.…”

Section: Laser-induced Damage Thresholdmentioning

confidence: 99%

Growth ofl-arginine phosphate monohydrate crystals in different orientations to achieve isometric morphology for device applications

et al. 2016

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The effect of seed orientation on the growth rate and aspect ratio of LAP crystals was studied using four different seed orientations, namely (100), ( 010), ( 001) and ( 011), with the aim of achieving the isometric morphology required for device applications. For each experiment the growth rates along the principal crystallographic axes and the aspect ratio of the crystal were quantified. It was found that the growth rate was highest along the b-axis for all the seed orientations investigated and followed the trendwhich is explained on the basis of low bond strength between the (100) cleavage planes and the relative step energies along the band c-axis. The aspect ratio of the crystal grown using (011) oriented seed results in a nearly isometric shape. The structural and optical quality of the (011) oriented crystal was investigated using several optical and X-ray techniques. The optical transmittance was ∼88% for 1064 nm and its 2nd (532 nm) and 3rd (355 nm) harmonics, indicating the usability of the material for frequency conversion applications. The band gap of the materials obtained from the UV cutoff was 5.4 eV. Birefringence interferometry and Mach-Zehnder interferometry showed that the refractive index homogeneity of the crystal is very good. The LDT values (4.8 to 6.6 GW cm −2 ) show that the crystal is suitable for high-power laser applications. X-ray diffraction topography was used for mapping the defect structure of the crystal and the results were correlated with optical microscopy studies. The above characterizations show that (011) oriented LAP crystal has good optical and structural quality and is suitable for device applications.

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Laser Resistant Coatings

Stolz

Génin

2003

Optical Interference Coatings

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106-μm laser damage of thin film optical coatings: a round-robin experiment involving various pulse lengths and beam diameters

Cited by 44 publications

References 11 publications

Laser Damage Threshold of Ceramic YAG

Laser Damage Threshold of Ceramic YAG

Growth ofl-arginine phosphate monohydrate crystals in different orientations to achieve isometric morphology for device applications

Laser Resistant Coatings

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