...). After the prescribed number of cycles was attained each specimen was removed and inspected for fretting damage and characterized utilizing a confocal microscope and a scanning electron microscope. Each specimen was then cycled to fracture or run-out without the applied normal force. A damage threshold...

... We present results of a study of the laser induced damage thresholds of Tl 3 AsSe 3 at 10 μm using nanosecond and picosecond pulses. The damage threshold was found to be ≃10 J/cm 2 with 130 ns (FWHM) and no damage was observed using 60 ps pulses. damage threshold CO 2 laser nonlinear...

... powder were reduced by photo-chemical dissociation using the combination of ultraviolet light and an oxidant (hydrogen peroxide). The resultant total organic carbon (TOC) of the solution was less than 0.1ppm. The damage threshold of the crystals grown from this solution were always high (20–22 J/cm 2...

... mass analyzed with a quadruple mass spectrometer which recorded the partial pressure of a given species as a function of time. Single pulse damage thresholds found in this study were consistent with those reported in the literature. Important differences are exhibited in pulse radiation data depending...

... By means of acoustic probe beam deflection we have measured the energy of acoustic pulses released during the interaction of intense laser pulses with solid surfaces. This technique is well suited to determine surface damage thresholds. We find that for a sufficiently high defect density...

... Small spot size (3.5 mm) laser damage testing at 10.6 μn has been used on samples which consisted of metallic and metallic oxide coatings on polymeric substrates. Three degrees of damage were used to define damage thresholds. While absolute threshold values were different for each of the three...

... We report the results of measurement of laser induced surface damage threshold of wire grid polarizers at 10.6 μm as a function of orientation of the wires and polarization of light. We also measured the absorption of wire grids at 10.6 μm, 1.06, and 0.53 μm. The results of surface damage...

... after extensive filtration or distillation to remove absorbing dust particles. A correlation is made between the damage thresholds and the number of scattering centers per volume observed in a HeNe beam. The HeNe laser beam scattering in the sample was used as an indicator of the impurity content...

... Potassium dihydrogen phosphate (KDP)crystals were grown under the irradiation of ultraviolet light. The bulk laser damage threshold was improved two to three times (15 – 20 J/cm 2 ) compared to the case of crystals grown by conventional methods. Microbes such as germs and bacteria are frequently...

... Mechanically hard and broadband gradient refractive index artireflection coating was developed. It has a high damage threshold of >6 J/cm 2 at 355 nm and 12–13 J/cm 2 in the visible to near-infrared region. It will be applicable to high power pulsed lasers as well as to industrial uses...

... as pulse duration increased from 1 to 25 ns. Laser hardening of thresholds was observed at both 350-nm and 1064-nm. damage threshold KDP Laser hardening pulse length dependence Manuscript Not Received - Variations with Laser Pulse Duration of the Thresholds at 350-nm and I064-nm for Bulk Damage...

... Damage thresholds of antireflection coatings on sapphire and alexandrite substrates have recently been measured. Optimization of AR coatings was necessary to improve damage thresholds on alexandrite laser rods, over that observed on the bare material. Eight different coatings supplied by seven...

.... damage threshold impurities optical thin films refractive index stoichiometry ultrahigh vacuum ZrO 2 STP954-EB/Oct. 1986 Manuscript Received 12-15-84 SAB Some Recent Observations on the Properties of UHV-Deposited Zr02 T. Raj, L. D. Weaver, S. R. Tuenge, J. S. Price and K. C. Jungling Martin...

... the performance of the different French manufacturers production (polished fused silica was provided by SORO, REOSC, BERTIN ESO, STIGMA-OPTIQUE, ELECTRO-QUARTZ). Damage threshold 3ωo Fused silica Polishing STP911-EB/N0V. 1985 Mana6cAx.pt Ktctivzd I-9-S4/A(W. DAMAGE THRESHOLD OF FUSED SILICA AT 3wo J.F...

... Development of new high power laser for laser-matter interaction in C.E.A. Limeil requires the realization of H.R. coatings with damage thresholds above 8 J/cm 2 . MATRA's laboratory “couches minces optiques” (thin optical layers) production commercial mirrors was around 3.5 J/cm 2 in 1982...

... This paper relates a technique for increasing the optical strength of NaCl and KCl single-crystal samples. The 1.06-μm pulsed laser damage thresholds were increased by factors as large as 4.6 for some bulk NaCl single crystal, namely the laser grade NaCl purchased from Harshaw Chemical Company...

... A preliminary study has been conducted to investigate the effects of spot size on the laser induced damage threshold in thin films. Damage was produced by the interference fringes of two beams from a frequency-doubled Nd-YAG laser with a nearly Gaussian spatial profile. Fringes of spacing from 5...

... in the damage threshold and a marked decrease of the free carrier densities required for damage to occur. Beam deformation, caused by free-carrier induced changes of the dielectric function, should therefore be less pronounced than that predicted by model calculations of laser damage in the absence of primary...

... at other wavelengths. Also, attempts to minimize the field in the material proper may entail novel problems in the film, in which the damage mechanism may be an absorptive one. Damage threshold Electric fields Internal reflection Protective coatings ELECTRIC FIELDS NEAR COATED SURFACES...

.... The relative role of electron avalanche and multiphoton ionization in laser damage of transparent dielectrics is discussed and it is shown that it is strongly influenced by the pulse widths. Damage threshold electron avalanche frequency and pulse width dependencies of the critical field multiphoton...