Laser beam directors with nonlinear optical correction

1999 ◽  
Author(s):  
Vladimir Y. Venediktov ◽  
Alexey Leshchev ◽  
Michael V. Vasil'ev
Keyword(s):  
Laser Beam ◽  
Nonlinear Optical ◽  
Optical Correction

Laser beam directors with nonlinear optical correction

1998 ◽  
Author(s):  
Vladimir Y. Venediktov ◽  
Alexey Leshchev ◽  
Michael V. Vasil'ev
Keyword(s):  
Laser Beam ◽  
Nonlinear Optical ◽  
Optical Correction

A Theoretical Study of the Refractive Index of KDP Crystal Doped with TiO2 Nanoparticles

2017 ◽  
pp. 524-534
Author(s):  
Volodymyr Krasnoholovets
Keyword(s):  
Laser Beam ◽  
Tio2 Nanoparticles ◽  
Nonlinear Optical ◽  
Ferroelectric Phase ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Optical Response ◽  
Local Area ◽  
Nonlinear Susceptibility ◽  
Non Linear

In the present chapter we study a nonlinear response of an optical matrix formed by the K2HPO4 crystal doped with TiO2 nanoparticles. Such doped matrix is a nonlinear optical system that is characterized by the cubic non-linear optical response at picosecond laser pulses. Laser pulses release photoelectrons from nanoparticles, which emerge as free carriers on the nanoparticles' surface generating an electric field in local area of the K2HPO4 matrix, which results in the phase transition from the paraphase to the ferroelectric phase state. The appeared ferroelectric phase induces a large polarization around TiO2 nanoparticles, which in turn immediately produces a nonlinear optical response to the laser pulse of the inverse sign, such that the laser beam becomes more focused. The gigantic non-linear susceptibility ??(3) responsible for the phenomenon of focusing of the laser beam is calculated by using the pseudospin model for the description of ferroelectric crystals and the expressions for nonlinear-susceptibility tensor components computed by other researchers.

scholarly journals Laser induced protonation of free base porphyrin in chloroform results in the enhancement of positive nonlinear absorption due to conformational distortion

2013 ◽  
Vol 17 (11) ◽  
pp. 1129-1133 ◽  
Author(s):  
Monika Zawadzka ◽  
Jun Wang ◽  
Werner J. Blau ◽  
Mathias O. Senge
Keyword(s):  
Laser Beam ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Chloroform Solution ◽  
Optical Limiting ◽  
Free Base ◽  
Nlo Materials ◽  
Set Up

Free base porphyrin in chloroform solution irradiated with focused laser beam, in an open Z-scan set-up, changed color from purple to green, which was associated with protonation of the porphyrin with protonic species from photodegradation of the solvent. Protonation is demonstrated as a simple means to improve the optical limiting performance of free base porphyrin nonlinear optical (NLO) materials.

Nonlinear optical correction of the pulse shape from a directly modulated DFB laser

2008 ◽  
Vol 281 (4) ◽  
pp. 824-830 ◽  
Author(s):  
R. Rojas-Laguna ◽  
J. Gutierrez-Gutierrez ◽  
E.A. Kuzin ◽  
M.A. Bello-Jimenez ◽  
B. Ibarra-Escamilla ◽  
...  
Keyword(s):  
Pulse Shape ◽  
Nonlinear Optical ◽  
Optical Correction ◽  
Dfb Laser

Effects of random phase distortion and nonlinear optical processes on laser beam uniformity and spatial incoherence (ISI)

1993 ◽  
Author(s):  
Robert H. Lehmberg ◽  
Stephen P. Obenschain ◽  
Carl J. Pawley ◽  
Mark S. Pronko ◽  
A. V. Deniz ◽  
...  
Keyword(s):  
Laser Beam ◽  
Nonlinear Optical ◽  
Random Phase ◽  
Phase Distortion

SELF-FOCUSING EFFECTS AND APPLICATIONS USING THIN NONLINEAR MEDIA

1992 ◽  
Vol 01 (03) ◽  
pp. 541-561 ◽  
Author(s):  
J.A. HERMANN
Keyword(s):  
Laser Beam ◽  
Nonlinear Optical ◽  
Far Field ◽  
Nonlinear Media ◽  
Self Focusing ◽  
Optical Effects ◽  
Nonlinear Optical Effects

A model of the nonlinear optical effects attending the interaction of a laser beam with a thin Kerr-type medium has been analyzed in detail. The formalism developed is applicable to both near- and far-field situations. Some possible applications are discussed.

scholarly journals Tunable LiNbO3-based diffractive optical element for the control of transverse modes of a laser beam

2021 ◽  
Vol 45 (2) ◽  
pp. 222-226
Author(s):  
A.A. Esin ◽  
A.R. Akhmatkhanov ◽  
V.S. Pavelyev ◽  
V.Y. Shur
Keyword(s):  
Laser Beam ◽  
Single Crystal ◽  
Nonlinear Optical ◽  
Optical Element ◽  
Diffractive Optical Element ◽  
Gaussian Laser Beam ◽  
Transverse Modes ◽  
Ferroelectric Single Crystal

A diffractive optical element based on a nonlinear-optical ferroelectric single crystal has been proposed, synthesized, and experimentally characterized. The element allows fast modulation of transverse modes of a Gaussian laser beam.

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