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laser/dantų ėduonis
Nuoroda įrašoma į mainų sritį
Puslapis 1 nuo 11252 rezultatus
Ti:sapphire laser cavity mode and pump-laser mode calculations.
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Comprehensive calculations of the cavity mode size throughout a Ti:sapphire laser, made with the ABCD Gaussian beam formalism are reported. These calculations show that the beam is not collimated, in general, in what are normally referred to as the collimated arms of the laser cavity. Additionally,
Laser-driven coherent betatron oscillation in a laser-wakefield cavity.
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The origin of beam disparity in emittance and betatron oscillation orbits, in and out of the polarization plane of the drive laser of laser-plasma accelerators, is explained in terms of betatron oscillations driven by the laser field. As trapped electrons accelerate, they move forward and interact
[Lasers in dentistry 2. Diagnosis of dental caries with lasers].
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When enamel, dentine and substances in caries lesions are exposed to (laser) light of a specific colour, fluorescence may be induced. This principle is at the basis of two caries diagnostic methods, DIAGNOdent and Quantitative Laser (Light-induced) Fluorescence (QLF). Only the DIAGNOdent is
LASERS AND CARIES.
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Continuous-wave Raman laser pumped within a semiconductor disk laser cavity.
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A KGd(WO₄)₂ Raman laser was pumped within the cavity of a cw diode-pumped InGaAs semiconductor disk laser (SDL). The Raman laser threshold was reached for 5.6 W of absorbed diode pump power, and output power up to 0.8 W at 1143 nm, with optical conversion efficiency of 7.5% with respect to the
Cs laser with unstable cavity transversely pumped by multiple diode lasers.
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We have demonstrated a Cs vapor laser with an unstable resonator transversely pumped by 15 narrowband laser diode arrays. A slope efficiency of 43%, a total optical efficiency of 31% and a maximum output power 49 W were obtained with a pump power of 157 Watts.
KrF laser-pumped dye-laser studies.
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Dye-laser efficiency measurements were performed on four Coumarin dyes: C-485, C-498, C-500, and C-503, all operating near 500 nm. They were pumped with a 16-ns pulse-length KrF laser. The most efficient of the Coumarin dyes tested was C-498. The intrinsic efficiency of this dye was found to
Development of a compact vertical-cavity surface-emitting laser end-pumped actively Q-switched laser for laser-induced breakdown spectroscopy.
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This paper reports the development of a compact and portable actively Q-switched Nd:YAG laser and its applications in laser-induced breakdown spectroscopy (LIBS). The laser was end-pumped by a vertical-cavity surface-emitting laser (VCSEL). The cavity lases at a wavelength of 1064 nm and produced
An extended cavity femtosecond Cr:LiSAF laser pumped by low cost diode lasers.
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We describe an extended cavity femtosecond Cr:LiSAF laser pumped by inexpensive single spatial mode diodes. Using a multi-pass cavity (MPC) to lower the repetition rate and a saturable Bragg reflector (SBR) for mode-locking, pulse energies of 0.75 nJ at a repetition rate of 8.6 MHz are achieved with
Particle identification by laser-induced incandescence in a solid-state laser cavity.
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The laser-induced incandescence of a particle of unknown size and composition can be detected simultaneously with the light elastically scattered by the particle, providing information on both the size and composition of the particle. The technique relies on vaporization of the particle; detection
Caries removal using lasers.
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Data sourcesCochrane Oral Health Trials Register, Cochrane Central Register of Controlled Trials (CENTRAL), Medline Ovid, Embase Ovid, ProQuest Dissertations and Theses, Zetoc, ISI Web of Knowledge, US National Institutes of Health Ongoing Trials Register ClinicalTrials.gov, and the WHO
External cavity laser biosensor.
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Utilizing a tunable photonic crystal resonant reflector as a mirror of an external cavity laser cavity, we demonstrate a new type of label-free optical biosensor that achieves a high quality factor through the process of stimulated emission, while at the same time providing high sensitivity and
Infrared laser tissue ablation: holmium:YAG laser surgery.
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The in vivo tissue ablation characteristics of a pulsed holmium:YAG laser (lambda = 1,980 nm) were studied. The laser energy was coupled onto nylon fibers 400 and 600 microns in core diameter. Laser incisions were made on white rats at different sites of the tongue and of the mucous membranes of the
Frequency-stabilized laser-diode-pumped Nd:YAG laser.
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We describe a frequency-stabilized diode-pumped Nd:YAG laser that is actively frequency stabilized relative to a reference Fabry-Perot cavity using the Pound-Drever technique. We describe the servo loop and the measurement of its noise and gain performance and demonstrate its ability to reduce the
Ultracompact Pseudowedge Plasmonic Lasers and Laser Arrays.
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Concentrating light at the deep subwavelength scale by utilizing plasmonic effects has been reported in various optoelectronic devices with intriguing phenomena and functionality. Plasmonic waveguides with a planar structure exhibit a two-dimensional degree of freedom for the surface plasmon; the
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