scholarly journals Selective laser ablation of carious lesions using simultaneous scanned near-IR diode and CO2 lasers

2017 ◽  
Author(s):  
Kenneth H. Chan ◽  
Daniel Fried
Keyword(s):  
Laser Ablation ◽  
Co2 Lasers ◽  
Near Ir ◽  
Carious Lesions

scholarly journals Near-IR imaging of erbium laser ablation with a water spray

2008 ◽  
Author(s):  
Cynthia L. Darling ◽  
Marie E. Maffei ◽  
William A. Fried ◽  
Daniel Fried
Keyword(s):  
Laser Ablation ◽  
Water Spray ◽  
Erbium Laser ◽  
Near Ir ◽  
Ir Imaging

Frequency Doubling of CW And Pulsed CO2 Lasers Using Diffusionbonded, Quasi-Phase-Matched Gaas Stacks

1997 ◽  
Vol 484 ◽  
Author(s):  
Melvin C. Ohmer ◽  
Shekhar Guha ◽  
Ronald E. Perrin ◽  
Laura S. Rea ◽  
Phil Won Yu ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Pulse Length ◽  
Central Area ◽  
Frequency Doubling ◽  
Power Spectrum Analysis ◽  
Co2 Lasers ◽  
Interface Quality ◽  
First Order ◽  
Near Ir ◽  
Transmission Data

AbstractWe describe the fabrication, characterization and frequency doubling properties of first order stacks of diffusion bonded 2″ diameter GaAs wafers. Near IR imaging through the stacks indicated that excellent bonding was obtained over 40%–70% of the central area of the wafers. A power spectrum analysis of the spectral noise (due to interface reflections) appearing in the transmission data is shown to be a quantitative diagnostic tool useful for determining interface quality and for accurately estimating the thickness of the bonded layers in a stack. The conversion efficiency for a four layer stack at 10.6 microns was found to be 0.03% or 3 mJ for a 10 mJ pulse with a 100 nanosecond pulse length. The corresponding efficiency for cw SHG was found to be 0.0002%.

Near-IR imaging of thermal changes in enamel during laser ablation

2010 ◽  
Author(s):  
Linn H. Maung ◽  
Chulsung Lee ◽  
Daniel Fried
Keyword(s):  
Laser Ablation ◽  
Near Ir ◽  
Ir Imaging ◽  
Thermal Changes

scholarly journals SERS active Ag–SiO2 nanoparticles obtained by laser ablation of silver in colloidal silica

2018 ◽  
Vol 9 ◽  
pp. 2396-2404 ◽  
Author(s):  
Cristina Gellini ◽  
Francesco Muniz-Miranda ◽  
Alfonso Pedone ◽  
Maurizio Muniz-Miranda
Keyword(s):  
Laser Ablation ◽  
Sio2 Nanoparticles ◽  
Colloidal Dispersion ◽  
Near Ir ◽  
Transmission Electron ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Silver Target ◽  
Enhanced Raman Scattering ◽  
Ligand Adsorption

Highly stable Ag–SiO2 nanoparticle composites were first obtained by laser ablation of a silver target in an aqueous colloidal dispersion of silica and examined by UV–vis absorption spectroscopy, transmission electron microscopy and Raman spectroscopy. The surface enhanced Raman scattering (SERS) activity of these nanocomposites was tested using 2,2’-bipyridine as a molecular reporter and excitation in the visible and near-IR spectral regions. The computational DFT approach provided evidence of ligand adsorption on positively charged adatoms of the silver nanostructured surface, in a very similar way to the metal/molecule interaction occurring in the corresponding Ag(I) coordination compound.

scholarly journals Real-time near IR (1310 nm) imaging of CO_2 laser ablation of enamel

2008 ◽  
Vol 16 (4) ◽  
pp. 2685 ◽  
Author(s):  
Cynthia L. Darling ◽  
Daniel Fried
Keyword(s):  
Laser Ablation ◽  
Real Time ◽  
Near Ir
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