Note: External multipass optical trap for counterpropagating pulsed laser applications

2013 ◽  
Vol 84 (7) ◽  
pp. 076102 ◽  
Author(s):  
J. S. Graul ◽  
A. D. Ketsdever ◽  
G. P. Andersen ◽  
T. C. Lilly
Keyword(s):  
Optical Trap ◽  
Pulsed Laser ◽  
Laser Applications

Thermal Modeling of Transport Phenomena for a Pulsed Laser Melting Process

2020 ◽  
Vol 978 ◽  
pp. 114-120
Author(s):  
Siladitya Sukumar ◽  
Satya Prakash Kar
Keyword(s):  
Transport Phenomena ◽  
Pulsed Laser ◽  
Melting Process ◽  
Maximum Temperature ◽  
Work Piece ◽  
Computational Domain ◽  
Laser Melting ◽  
Laser Applications ◽  
Melt Pool ◽  
Volume Method

Single pulsed laser melting in a cylindrical titanium alloy work piece is studied numerically using an axisymmetric model. Finite volume method and Tri-Diagonal Matrix Algorithm (TDMA) are used for discretization of the energy equation and solving the resulting algebraic equation respectively in order to obtain temperature distribution inside the computational domain. Heat losses from the irradiated surface takes place through convection and radiation and other surfaces are kept insulated. A volumetric and Gaussian laser is irradiated on the work piece. Validation of the present model with the existing literature is done first and the results agree very well. Then, the detailed transport phenomena during the laser melting process is studied using the model. The enthalpy porosity technique is used track the melt pool shape and size. The role of natural convection and Marangoni convection in controlling the shape of melt pool is discussed. Maximum temperature results at domain centre and it then decreases exponentially along the axial and radial direction of the work piece because of Gaussian nature of the pulse. The numerical results obtained can provide the direction to develop models for all type of laser applications used in the industry.

Nd3+ Doped Phosphate Glass Waveguides for Pulsed Laser Applications

2016 ◽  
Author(s):  
N. G. Boetti ◽  
D. Pugliese ◽  
E. Ceci-Ginistrelli ◽  
J. Lousteau ◽  
F. Poletti ◽  
...  
Keyword(s):  
Phosphate Glass ◽  
Pulsed Laser ◽  
Laser Applications ◽  
Glass Waveguides

scholarly journals Fabrication and evaluation of negative axicons for ultrashort pulsed laser applications

2020 ◽  
Vol 28 (18) ◽  
pp. 26207 ◽  
Author(s):  
Simon Schwarz ◽  
Gian-Luca Roth ◽  
Stefan Rung ◽  
Cemal Esen ◽  
Ralf Hellmann
Keyword(s):  
Pulsed Laser ◽  
Laser Applications ◽  
Ultrashort Pulsed Laser

Ultra-broad band glass for short pulsed laser applications

2016 ◽  
Author(s):  
Simi A. George ◽  
Sally Pucilowski ◽  
Joseph S. Hayden ◽  
Eric H. Urruti
Keyword(s):  
Broad Band ◽  
Pulsed Laser ◽  
Laser Applications

Simulation of stabilizing process of dielectric nanoparticle in optical trap using counter-propagating pulsed laser beams

2010 ◽  
Vol 8 (3) ◽  
pp. 332-334 ◽  
Author(s):  
Ho Quang Quy Ho Quang Quy ◽  
Mai Van Luu Mai Van Luu ◽  
Hoang Dinh Hai Hoang Dinh Hai ◽  
Donan Zhuang Donan Zhuang
Keyword(s):  
Optical Trap ◽  
Pulsed Laser ◽  
Laser Beams ◽  
Dielectric Nanoparticle

scholarly journals Nonlinear Optical Response of Reflective MXene Molybdenum Carbide Films as Saturable Absorbers

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2391
Author(s):  
Jiang Wang ◽  
Yonggang Wang ◽  
Sicong Liu ◽  
Guangying Li ◽  
Guodong Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Molybdenum Carbide ◽  
Modulation Depth ◽  
Pulsed Laser ◽  
Laser Pulses ◽  
Average Output ◽  
Laser Applications ◽  
Short Pulses ◽  
Saturable Absorbers ◽  
Silver Mirror

Molybdenum carbide (Mo2C) is a two-dimensional (2D) MXene material which makes it a promising photoelectric material. In this study, reflective type MXene Mo2C thin films were coated on a silver mirror by a magnetron sputtering method and were subsequently used in a passively Q-switched solid-state pulsed laser generator at the central wavelengths of 1.06 and 1.34 μm, respectively. The fabricated thin films of reflective type MXene Mo2C exhibited large modulation depth of 6.86% and 5.38% at the central wavelengths of 1064 and 1342 nm, respectively. By inserting the Mo2C saturable absorbers (SAs) into V-shaped Nd:YAG laser, short pulses were generated having a pulse duration, pulse energy, and average output power of 254 ns, 2.96 μJ, and 275 mW, respectively, at a wavelength of 1.06 μm. Similarly, shorter laser pulses were obtained in Nd:YVO4 laser at 1.34 μm. Our results illustrated potential of the 2D MXene Mo2C films for laser applications.

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