Nonlinear Regimes of Longitudinal Acoustic Pulse Excitation in Piezocrystals by Ultrashort Laser Action

1992 ◽  
pp. 306-308
Author(s):  
V. E. Gusev ◽  
L. N. Makarova
Keyword(s):  
Acoustic Pulse ◽  
Laser Action ◽  
Pulse Excitation ◽  
Longitudinal Acoustic ◽  
Ultrashort Laser ◽  
Nonlinear Regimes

High-Power UV Ultrashort Laser Action on DNA and Its Components

1980 ◽  
pp. 336-339 ◽  
Author(s):  
D. A. Angelov ◽  
G. G. Gruzadyan ◽  
P. G. Kryukov ◽  
V. S. Letokhov ◽  
D. N. Nikogosyan ◽  
...  
Keyword(s):  
High Power ◽  
Laser Action ◽  
Ultrashort Laser

Terahertz Radiation from a (113)B GaAs/AlAs Coupled Multilayer Cavity Generated by Ultrashort Laser Pulse Excitation

2012 ◽  
Vol 51 (4S) ◽  
pp. 04DG05 ◽  
Author(s):  
Sho Katoh ◽  
Toshikazu Takimoto ◽  
Yoshinori Nakagawa ◽  
Ken Morita ◽  
Takahiro Kitada ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Terahertz Radiation ◽  
Ultrashort Laser Pulse ◽  
Pulse Excitation ◽  
Laser Pulse Excitation ◽  
Ultrashort Laser

Ultrashort shear acoustic pulse excitation via laser-induced electrostrictive effect (abstract)

2003 ◽  
Vol 74 (1) ◽  
pp. 901-901 ◽  
Author(s):  
V. Gusev ◽  
P. Picart ◽  
D. Mounier ◽  
J. M. Breteau
Keyword(s):  
Acoustic Pulse ◽  
Pulse Excitation ◽  
Electrostrictive Effect

scholarly journals Room Temperature Laser Action in Laterally Overgrown GaN Pyramids on (111) Silicon

1999 ◽  
Vol 4 (S1) ◽  
pp. 739-744 ◽  
Author(s):  
S. Bidnyk ◽  
B. D. Little ◽  
Y. H. Cho ◽  
J. Krasinski ◽  
J. J. Song ◽  
...  
Keyword(s):  
Room Temperature ◽  
Optical Pumping ◽  
Laser Action ◽  
Chemical Vapor ◽  
Pulse Excitation ◽  
Organic Chemical ◽  
Seeding Layer ◽  
Light Emitting ◽  
Practical Applications ◽  
Metal Organic

Single and multi-mode room temperature laser action was observed in GaN pyramids under strong optical pumping. The 5- and 15-micron-wide hexagonal-based pyramids were laterally overgrown on a patterned GaN/AlN seeding layer grown on a (111) silicon substrate by metal-organic chemical vapor deposition. The pyramids were individually pumped, imaged, and spectrally analyzed through a high magnification optical system using a high density pulsed excitation source. We suggest that the cavity formed in a pyramid is of a ring type, formed by total internal reflections of light off the pyramids’ surfaces. The mode spacing of the laser emission was found to be correlated to the size of pyramids. The effects of pyramid geometry and pulse excitation on the nature of laser oscillations inside of the pyramids is discussed. Practical applications of the results for the development of light-emitting pixels and laser arrays are suggested.

Dynamics of the CO2 Atmospheric Pressure Laser with Transverse Pulse Excitation

1972 ◽  
Vol 50 (20) ◽  
pp. 2523-2535 ◽  
Author(s):  
J. Gilbert ◽  
J. L. Lachambre ◽  
F. Rheault ◽  
R. Fortin
Keyword(s):  
Atmospheric Pressure ◽  
Laser Emission ◽  
Initial Conditions ◽  
Energy State ◽  
Laser Action ◽  
Rate Equations ◽  
Pulse Excitation ◽  
Gain Switching ◽  
Strong Current ◽  
Kinetics Of

The dynamical processes responsible for laser emission in the pulsed pumping of a transversely excited atmospheric (TEA) CO2 laser are investigated. An explanation for the formation of the giant pulse is proposed on the basis of a gain-switching mechanism in which it is assumed that with short strong-current pulses a high population inversion can be achieved prior to the onset of laser action. The kinetics of the mechanism are described by means of a set of nonlinear rate equations idealized to a four-energy-state system. With suitable initial conditions on the populations, the transient solution of these equations for the mixtures CO2–He and CO–N2–He appears to be consistent with the major features of experimental observation.

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