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Showing 1 to 20 of 48 for “"yag"”.
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Pyrolyse- und Sinterverhalten Sol-Gel-abgeleiteter Al2O3-YAG-Fasern
… die zu einem Mischgefüge aus Al2O3 und YAG führen (Volumenverhältnis 45 : 55), wurden zu Fasern versponnen, in unterschiedlichen Atmosphären pyrolysiert und abschließend gesintert. Die strukturelle Ent-wicklung während der Pyrolyse der Gel-Fasern wurde in Abhängigkeit von …
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Ultrashort pulse generation with solid state Cr⁴⁺:YAG laser
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2003.
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Kinetics and Pathways for Crystallization of Amorphous Mullite and YAG
Pseudotetragonal mullite gradually converted to equilibrium, orthorhombic, 3:2 mullite between 1000--1400°C. This was characterized by assimilation of the embedded, silica-rich inclusions and the elimination of internal strain. Additionally, recrystallization of numerous, small, strain- and …
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Photoluminescence and cathodoluminescence of undoped and cerium doped YAG single crystals
Thesis (Elec.E)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1982.
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A few-cycle Cr⁴⁺:YAG laser and optical studies of photonic crystals
A prismless Cr4+:YAG laser was used to generate 20 fs pulses at 1450 nm with a bandwidth of 190 nm FWHM. Intracavity group velocity dispersion was compensated with double-chirped mirrors. Pulse spectrum was observable from 1140 to >1700 nm. Broadband saturable Bragg reflectors were designed and …
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A Q-switched, cavity-dumped YAG laser for use in plasma physics experiments
A Q-switched, cavity-dumped Nd:YAG laser was developed for use as a diagnostic tool in plasma physics experiments. This laser uses an unstable resonator configuration to produce higher gain and better collimation than would otherwise be possible. Pulses of light with energies of 18±2 mJ and FWHMs …
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LASER DIODE PUMPED ND: YAG SOLID STATE LASER FOR APPLICATIONS IN SECOND HARMONIC GENERATION
In this thesis, a new pumping approach for the YAG laser pumped by laser diode is proposed to achieve high energy/power performances. In this approach, the central part of the pump beam from the laser diode is absorbed directly by the YAG rod through its convex end surface, which is very much like …
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Quenching and tempering effects on Rheo-cast F357 aluminium alloy during Nd: YAG laser welding
Al-Si-Mg casting alloys are being used in automotive applications, aerospace applications and other applications requiring heat-treatable permanent mould castings that combine good weldability with high strength and toughness (ASM). These casting alloys are also known for their excellent …
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Experimental characterization of Cr4+:YAG passively Q-switched Cr:Nd:GSGG lasers and comparison with a simple rate equation model
… Cr:Nd:GSGG lasers passively Q-switched by a Cr4+:YAG crystal. This work will focus on the performance of these lasers as a function of two key design parameters, the passive Q-switch initial transmission (T0) and laser resonator output coupling (ROC), when values are varied over a wide range. Four …
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A Dy:YAG coated fiber optic thermal sensor - proof of concept
… the fiber). In the prototype sensor design a Dy: YAG layer was coated onto the core of a fused silica optical fiber. The Dy: YAG is a ceramic material which fluoresces in the visible when excited with ultra-violet radiation. The visible emission has a direct correlation with temperature up to the …
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Optical and structural characterization of crystalline oxides for laser applications
… mixed garnet host materials, like Y3Al5O12 (YAG), Y3Sc2Ga3O12 (YSGG), Gd3Sc2Ga3O12 (GSGG) and Y3Sc2Al3O12 (YSAG), doped with lanthanides allow the so-called compositional tuning. In this work we studied the optical and structural properties of two different materials with garnet structure: …
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Incorporation of Nonconventional Crystalline Materials onto the Integrated Photonics Platform
… niobate (LN, LiNbO3), yttrium aluminum garnet (YAG, Y3Al5O12) and diamond. In order to incorporate those crystals into existing multi-scale integrated system platforms, new technologies must be developed that can supply high-quality, single-crystal, thin-films in the desired thin-film …
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Design of Sintered, Tough, Oxide Laminate and Fibrous Monolithic Composites
… (Al2O 3), 50 vol% alumina · 50 vol% YAG (yttrium aluminum garnet, Y 3Al5O12) in situ composite, 50 vol% alumina · 50 vol% mullite in situ composite, zirconia (ZrO 2), and nickel aluminate (NiAl2O4) were used as matrix materials. Aluminum phosphate (AlPO4), alumina platelets, …
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Laser spectroscopy of color centers in yttrium aluminum garnet
Nd:YAG lasers have become ubiquitous as tools for spectroscopy, materials processing, and medical care. It is well known by crystal growers that lattice defects in Nd:YAG can stifle laser efficiency, but to date very little has been done to isolate and characterize individual YAG defects. Knowing …
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Grado de aclaramiento de tatuajes y eventos adversos, posterior a una sesión con láser q-switch
… II y IV. Equipos utilizados laser Q-Switch Nd Yag 1064 (83.3%), láser Q-Switch Nd YAG 532(11.3%) y laser Q-Switch Rubí (4.1%). El aclaramiento posterior a la sesión de láser fue evaluado por dos evaluadores independientes, mostrando concordancia significativa (Kappa de 0.615, p<0.001), con …
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Multi-Watt, diode-pumped planar waveguide lasers
… direct bonding, were investigated. A Nd:GGG on YAG waveguide fabricated by PLD was found to have a loss <0.5dB/cm, the lowest so far reported for a PLD layer. The waveguide lased on the four-level laser transition at around 1µm and, for the first time, on the quasi-three-level transition, around …
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Laser Diagnostic Techniques with Ultra-High Repetition Rate for Studies in Combustion Environments
… compression ignition in an engine cycle. A multi-YAG laser cluster and a high-speed framing camera capable of recording sequences of up to eight image frames, and having a framing rate up to the megahertz range were originally set up for these types of studies. Within the framework of this thesis, …
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Diagnostic and treatment tactics and Nd: YAG laser therapy in conditions of acute bleeding associated with gastric and duodenal ulcers // Диагностичнo-лечебна тактика и Nd:YAG лазер терапия в условията на остро кървене от стомашни и дуоденални язви
… и анализ на резултатите от приложението на Nd:YAG лазерната хемостаза при пациенти с кървене от СДЯ в условията на спешност. Проучени са 325 болни с остро кървене от СДЯ. При 295 е извършена Nd:YAG ЛФК. При 30 пациента - монополярна електрокоагулация. До втория час от приемането на пациентите, …
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Introduction of a Fully Relativistic Capable Basis Set in the ab initio Orthogonalized Linear Combination of Atomic Orbitals Method
… description improvements are tested against YAG, YBCO, SnO2 and BiF3. The improvements to the basis set reflect an improvement in both computational speed and accuracy
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