Fabrication of Yb/Ce-codoped aluminosilicate pedestal laser fiber

2019 ◽  
Author(s):  
Shuang Liu ◽  
Kun Peng ◽  
Li Ni ◽  
Xiaolong Wang ◽  
Shihao Sun ◽  
...  
Keyword(s):  
Laser Fiber

scholarly journals Computer-Aided Laser-Fiber Output Beam 3D Spatial and Angular Design

Symmetry ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 83
Author(s):  
Rocío Pérez de Prado ◽  
Sebastián García-Galán ◽  
José Enrique Muñoz-Expósito ◽  
Adam Marchewka
Keyword(s):  
Gaussian Beam ◽  
Beam Theory ◽  
Single Mode ◽  
Wave Theory ◽  
Spatial Behavior ◽  
Output Beam ◽  
Laser Fiber ◽  
Computer Aided ◽  
Fiber Output ◽  
Transverse Electromagnetic

Multiple laser beams and single-mode optical fibers output can be approximated by assuming that the emitted light has a symmetrical Gaussian intensity profile, which corresponds to the transverse electromagnetic mode (TEM00), which is designated as a Gaussian beam. Current free-accessible design tools are limited to the spatial analysis of the beams, in general, and to the intensity, in particular, and to the graphical visualization in 2D with very limited options. In this work, a novel a computer-aided laser-fiber output beam TEM00 designer, CATEM00, is presented based on the 3D representations typically provided by camera beam profilers, and on the fundamentals of the wave theory of light, including diverse flexibility capabilities for graphical manipulation and parameter comprehension both in terms of spatial behavior and in angular confinement. It must be highlighted that not only is the spatial limitation design of light impact relevant in TEM00 applications but, also, the angle with which the light reaches the target. Hence, the availability of capabilities of phase design in TEM00 following the paraxial limitations is highly convenient. Results and discussion in terms of intensity, power, divergence and wave fronts are presented considering a set of study cases, showing its coherence with Gaussian beam theory.

Ultra-low-loss double-cladding laser fiber fabricated by optimized chelate gas phase deposition technique

2018 ◽  
Vol 57 (27) ◽  
pp. 7943 ◽  
Author(s):  
Shengfei She ◽  
Weinan Li ◽  
Chang Chang ◽  
Zhe Li ◽  
Jinkun Zheng ◽  
...  
Keyword(s):  
Gas Phase ◽  
Deposition Technique ◽  
Low Loss ◽  
Laser Fiber ◽  
Gas Phase Deposition

scholarly journals MP32-16 A NOVEL RECOMMENDATION FOR GREENLIGHT&[TRADE] MOXY® LASER FIBER PERFORMANCE IMPROVEMENT AND DURABILITY

2020 ◽  
Vol 203 ◽  
pp. e490-e491
Author(s):  
Kevin Zorn* ◽  
Ahmed Sayed Zakaia ◽  
Dean Elterman ◽  
Enrique Rijo ◽  
Vincent Misrai ◽  
...  
Keyword(s):  
Performance Improvement ◽  
Laser Fiber

Debonding of Leucite-reinforced Glass-ceramic Veneers Using Er, Cr:YSGG Laser Device: Optimizing Speed with Thermal Safety

2021 ◽  
Vol 46 (1) ◽  
pp. 100-106
Author(s):  
CJ Walinski ◽  
JE Gibson ◽  
DS Colvert ◽  
DC Redmond ◽  
JH Jafarian ◽  
...  
Keyword(s):  
High Speed ◽  
Laser Energy ◽  
Water Spray ◽  
Thermal Safety ◽  
Tooth Structure ◽  
Laser Parameters ◽  
Anterior Teeth ◽  
Laser Fiber ◽  
Laminate Veneers ◽  
Dental Laser

Clinical Relevance Removing laminate veneers on anterior teeth by using an Er,Cr:YSGG dental laser can be completed faster than previously reported while maintaining thermal safety. SUMMARY Objective: When laminate veneer restorations require removal, the process is tedious, time-consuming, and potentially damaging to the underlying tooth structure. The purpose of this study was to evaluate the removal of Empress CAD milled laminate veneers on extracted human central incisors by using an Er,Cr:YSGG dental laser while optimizing speed and maintaining thermal safety. Methods and Materials: A total of 22 extracted human incisors were mounted in acrylic blocks. Conservative veneer preparations were made on all samples with a high-speed dental handpiece with a diamond bur and air/water spray. The 22 blocks of IPS Empress CAD were designed and milled into laminate veneers with a CAD/CAM System and luted to the prepared teeth. An Er,Cr:YSGG dental laser was fitted with a handpiece and laser fiber (600-μm diameter cylindrical fiber, 6 mm in length). Laser parameters were 333 mJ/pulse, 30 Hz, 80% air, 50% water, 600-μm diameter fiber tip, at a fluence of 885.96 J/cm2. The laser fiber tip was held directly on the surface of each veneer in contact, perpendicular to the surface, and moved slowly, covering the labial surface while firing. Results: At the laser parameters tested (333 mJ/pulse, 30 Hz, 80% air, 50% water, 600-μm diameter fiber tip), the average duration of exposure to completely remove each laminate veneer was 14.16 ± 0.60 seconds, with a range of 10.75 to 21.25 seconds. The average thickness of each veneer measured at the midfacial was 0.75 +/− 0.03 mm. The mean intrapulpal temperature increase for this period was 0.71°C ± 0.15°C. Conclusions: A regression model between time and thickness (p<0.0001) proved to be significant. However, the same cannot be said when the same modeling was tested between temperature and thickness. It can therefore be concluded that as the thickness of a veneer increases, more time is necessary to remove a veneer using Er,Cr:YSGG laser energy; however, increasing thickness does not necessarily result in an increase in pulpal temperature. Within the limitations of this study (single restorative material and single luting agent), it can be concluded that removing CAD Empress laminate veneer restorations using an Er,Cr:YSGG laser is reliable and thermally safe, even at an average of 10 W of power at 30 Hz. Additionally, thermal safety is maximized with adequate aerosolized water spray.

The impact of the laser fiber-tissue distance on histological parameters in a porcine kidney model

2020 ◽  
Author(s):  
Mark Taratkin ◽  
Christopher Netsch ◽  
Dmitry Enikeev ◽  
Andreas J. Gross ◽  
Thomas R. W. Herrmann ◽  
...  
Keyword(s):  
Porcine Kidney ◽  
Laser Fiber ◽  
The Impact

Hand-Held Thulium Laser Fiber and Ultrasonic Aspirator for Opening the Internal Auditory Canal During Acoustic Neuroma Microneurosurgery: Operative Technique

2019 ◽  
Vol 126 ◽  
pp. 497
Author(s):  
Luciano Mastronardi ◽  
Francesco Corrivetti ◽  
Carlo Giacobbo Scavo ◽  
Raffaelino Roperto ◽  
Guglielmo Cacciotti ◽  
...  
Keyword(s):  
Acoustic Neuroma ◽  
Operative Technique ◽  
Internal Auditory Canal ◽  
Thulium Laser ◽  
Ultrasonic Aspirator ◽  
Laser Fiber
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