scholarly journals Single Beam Z-Scan Measurement of Nonlinear Refractive Index of Crude Oils

2014 ◽  
Vol 05 (05) ◽  
pp. 280-284 ◽  
Author(s):  
Adeleh Granmayeh Rad
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Crude Oils ◽  
Single Beam

Nonlinear refractive index measurements in antimony–sulfide glass films using a single beam nonlinear image technique

2006 ◽  
Vol 260 (2) ◽  
pp. 723-726 ◽  
Author(s):  
Cid B. de Araújo ◽  
G. Boudebs ◽  
V. Briois ◽  
A. Pradel ◽  
Y. Messaddeq ◽  
...  
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Single Beam ◽  
Antimony Sulfide ◽  
Image Technique ◽  
Sulfide Glass ◽  
Glass Films

scholarly journals MEASUREMENT OF NONLINEAR RESPONSES AND OPTICAL LIMITING BEHAVIOR OF TIO2/PS NANO-COMPOSITE BY SINGLE BEAM TECHNIQUE WITH DIFFERENT INCIDENT INTENSITIES

2012 ◽  
Vol 05 ◽  
pp. 277-283 ◽  
Author(s):  
M. H. MAJLES ARA ◽  
Z. DEHGHANI
Keyword(s):  
Refractive Index ◽  
Absorption Coefficient ◽  
Nonlinear Absorption ◽  
Nonlinear Refractive Index ◽  
Optical Limiting ◽  
Nonlinear Absorption Coefficient ◽  
Third Order ◽  
Nano Composite ◽  
Single Beam ◽  
The Third

Titanium dioxide (titania) is a cheap, nontoxic and highly efficient photocatalyst being extensively applied for the degradation of organic pollutants, air purification, water splitting, reduction of nitrogen to ammonia, and optical devices due to its optical behaviors. The third-order nonlinear optical properties of TiO 2/ PS nano-composite were studied by means of single beam transmission technique, using a continuous-wave (CW) He - Ne laser beam with a wavelength of 632.8 nm with three different incident intensities. The magnitude and sign of the third-order nonlinear refractive index ( n 2) and nonlinear absorption (β) of TiO 2/ PS nano-composite were determined by use of both the closed-aperture and opened-aperture z -scan techniques. Z -scan technique, developed by Sheik-Bahae et al., has been used widely in material characterization. A single-beam (also called z -scan method) for measuring the sign and magnitude of nonlinear refraction that has simplicity and very high sensitivity has been reported recently. Optical limiting property of TiO 2/ PS nano-composite is studied. The positive sign obtained for nonlinear refractive index indicated that there is a self-focusing effect in the sample. The nonlinear refractive index was in order of 10-8 (cm2/W) and the nonlinear absorption coefficient was obtained in order of 10-2 (cm/W) with negative sign. The values of nonlinear refractive index and nonlinear absorption coefficient are enhanced by decreasing the intensity.

Single beam Z-scan for the calculation of nonlinear refractive index (n2) for poly(2,5-dimethylaniline)

2015 ◽  
Vol 24 (03) ◽  
pp. 1550039 ◽  
Author(s):  
M. K. Biswas ◽  
M. K. Amin ◽  
P. K. Das ◽  
E. Hoque ◽  
S. M. Sharafuddin ◽  
...  
Keyword(s):  
Refractive Index ◽  
Experimental Work ◽  
Nonlinear Refractive Index ◽  
Continuous Wave ◽  
Laser Beams ◽  
Single Beam ◽  
Ion Laser

An experimental work has been done to measure the nonlinear refractive index of poly(2,5-dimethylaniline) (PDMA). In this work, a continuous wave (cw) Ar-ion laser has been used to calculate n2 for a novel polymer; poly(2,5-dimethylaniline): synthesized from 2,5 dimethylaniline. The single beam Z-scan technique was used with laser beams of 514 and 488 nm wavelengths, taking PDMA in methanol solvent at different concentrations. The order of n2 was found to be of the order of ~ 10-14 esu.

scholarly journals Diffraction Rings Pattern and Nonlinear Optical Properties of Hybrid ZnO-NPs / Epoxy Resin

2020 ◽  
Vol 38 (3A) ◽  
pp. 440-445
Author(s):  
Zahraa M. AL-Asady ◽  
Ali H. AL-Hamdani
Keyword(s):  
Refractive Index ◽  
Absorption Coefficient ◽  
Epoxy Resin ◽  
Nonlinear Absorption ◽  
Nonlinear Refractive Index ◽  
Second Harmonic ◽  
Nonlinear Absorption Coefficient ◽  
Zno Nps ◽  
Nano Composite ◽  
Single Beam

In this research, the diffraction ring patterns scan and single-beam Z-scan techniques were used to measure the nonlinear refractive index (n2) and nonlinear absorption coefficient (β). Nano-composite sample, which consists of zinc oxide nanoparticles (ZnO-NPs), and epoxy resin polymer. The sample was prepared by the casting method. A second harmonic generation Nd: YAG laser, which operates at 532 nm and intensity 3183 W/cm2 was used for the two techniques. Z-scan results showed that values for nonlinear refractive index n2 and nonlinear absorption coefficient β were obtained of 6.59*10-9 cm2/W and 1.75*10-3 cm/W respectively. While results for the D-scan technique showed that the number of rings increases with the increasing of laser power.

Investigating the Nonlinear Optical Response of Pepper Oil under Low Power Irradiation with Continuous Wave Visible Laser Beam

2020 ◽  
pp. 131-138
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Nonlinear Optical ◽  
Continuous Wave ◽  
Diffraction Integral ◽  
Visible Laser ◽  
Limiting Property ◽  
Kirchhoff Diffraction Integral ◽  
Theoretical Results ◽  
Good Agreement

The nonlinear optical properties of pepper oil are studied by diffraction ring patterns and Z-scan techniques with continuous wave beam from solid state laser at 473 nm wavelength. The nonlinear refractive index of the sample is calculated by both techniques. The sample show high nonlinear refractive index. Based on Fresnel-Kirchhoff diffraction integral, the far-field intensity distributions of ring patterns have been calculated. It is found that the experimental results are in good agreement with the theoretical results. Also the optical limiting property of pepper oil is reported. The results obtained in this study prove that the pepper oil has applications in nonlinear optical devices.

scholarly journals Nonlinear refractive index of porcine cornea studied by z-scan and self-focusing during femtosecond laser processing

2010 ◽  
Vol 18 (4) ◽  
pp. 3700 ◽  
Author(s):  
M. Miclea ◽  
U. Skrzypczak ◽  
S. Faust ◽  
F. Fankhauser ◽  
H. Graener ◽  
...  
Keyword(s):  
Refractive Index ◽  
Femtosecond Laser ◽  
Nonlinear Refractive Index ◽  
Laser Processing ◽  
Self Focusing ◽  
Femtosecond Laser Processing ◽  
Porcine Cornea

Nonlinear refractive index of fluoride crystals

1977 ◽  
Vol 31 (12) ◽  
pp. 822-825 ◽  
Author(s):  
D. Milam ◽  
M. J. Weber ◽  
A. J. Glass
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Fluoride Crystals
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