scholarly journals Microscopic processes during ultrafast laser generation of Frenkel defects in diamond

2021 ◽  
Vol 104 (17) ◽  
Author(s):  
Benjamin Griffiths ◽  
Andrew Kirkpatrick ◽  
Shannon S. Nicley ◽  
Rajesh L. Patel ◽  
Joanna M. Zajac ◽  
...  
Keyword(s):  
Ultrafast Laser ◽  
Laser Generation ◽  
Frenkel Defects

Ultrafast laser generation of hard X-rays

1992 ◽  
Vol 28 (10) ◽  
pp. 2382-2387 ◽  
Author(s):  
J.D. Kmetec
Keyword(s):  
Ultrafast Laser ◽  
Laser Generation ◽  
X Rays

Plasmonic Ag nanoparticles embedded in lithium tantalate crystal for ultrafast laser generation

2019 ◽  
Vol 30 (33) ◽  
pp. 334001 ◽  
Author(s):  
Chi Pang ◽  
Rang Li ◽  
Ziqi Li ◽  
Ningning Dong ◽  
Jun Wang ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Lithium Tantalate ◽  
Ultrafast Laser ◽  
Laser Generation

scholarly journals Cladding-like waveguide fabricated by cooperation of ultrafast laser writing and ion irradiation: characterization and laser generation

2017 ◽  
Vol 25 (16) ◽  
pp. 19603 ◽  
Author(s):  
Jinman Lv ◽  
Zhen Shang ◽  
Yang Tan ◽  
Javier Rodríguez Vázquez de Aldana ◽  
Feng Chen
Keyword(s):  
Ion Irradiation ◽  
Ultrafast Laser ◽  
Laser Generation ◽  
Laser Writing

Transient collisional excitation X-ray laser generation with picoseconds laser pulses

2001 ◽  
Vol 11 (PR2) ◽  
pp. Pr2-39-Pr2-42 ◽  
Author(s):  
M. Kado ◽  
T. Kawachi ◽  
N. Hasegawa ◽  
M. Tanaka ◽  
K. Sukegawa ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Laser Generation ◽  
Collisional Excitation ◽  
X Ray

Ultrafast laser processing of ceramics: Comprehensive survey of laser parameters

2021 ◽  
Vol 33 (1) ◽  
pp. 012009
Author(s):  
Aiko Narazaki ◽  
Hideyuki Takada ◽  
Dai Yoshitomi ◽  
Kenji Torizuka ◽  
Yohei Kobayashi
Keyword(s):  
Laser Processing ◽  
Ultrafast Laser ◽  
Laser Parameters ◽  
Comprehensive Survey

Progress in ultrafast laser space-selective welding

2020 ◽  
Vol 13 (6) ◽  
pp. 1-15
Author(s):  
ZHANG Guo-dong ◽  
◽  
CHENG Guang-hua ◽  
ZHANG Wei ◽  
Keyword(s):  
Ultrafast Laser

From Semiconductor to Metal in a Flash: Observing Ultrafast Laser-Induced Phase Transformations

1997 ◽  
Vol 481 ◽  
Author(s):  
J. P. Callan ◽  
A. M.-T. Kim ◽  
L. Huangt ◽  
E. N. Glezer ◽  
E. Mazur
Keyword(s):  
Phase Transformations ◽  
Dielectric Function ◽  
Spectral Range ◽  
Laser Excitation ◽  
Spectroscopic Technique ◽  
Ultrafast Laser ◽  
Lattice Heating ◽  
Fs Laser

ABSTRACTWe use a new broadband spectroscopic technique to measure ultrafast changes in the dielectric function of a material over the spectral range 1.5–3.5 eV following intense 70-fs laser excitation. The results reveal the nature of the phase transformations which occur in the material following excitation. We studied the response of GaAs and Si. For GaAs, there are three distinct regimes of behavior as the pump fluence is increased — lattice heating, lattice disordering, and a semiconductor-to-metal transition.

scholarly journals In-Band Pumped Thulium-Doped Tellurite Glass Microsphere Laser

2021 ◽  
Vol 11 (12) ◽  
pp. 5440
Author(s):  
Elena A. Anashkina ◽  
Vitaly V. Dorofeev ◽  
Alexey V. Andrianov
Keyword(s):  
Tellurite Glass ◽  
High Gain ◽  
Glass Microsphere ◽  
Ion Concentration ◽  
Laser Generation ◽  
Q Factor ◽  
Narrow Line ◽  
Simple Theoretical Model ◽  
Q Factors ◽  
Doped Glass

Microresonator-based lasers in the two-micron range are interesting for extensive applications. Tm3+ ions provide high gain; therefore, they are promising for laser generation in the two-micron range in various matrices. We developed a simple theoretical model to describe Tm-doped glass microlasers generating in the 1.9–2 μm range with in-band pump at 1.55 μm. Using this model, we calculated threshold pump powers, laser generation wavelengths and slope efficiencies for different parameters of Tm-doped tellurite glass microspheres such as diameters, Q-factors, and thulium ion concentration. In addition, we produced a 320-μm tellurite glass microsphere doped with thulium ions with a concentration of 5·1019 cm−3. We attained lasing at 1.9 μm experimentally in the produced sample with a Q-factor of 106 pumped by a C-band narrow line laser.

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