scholarly journals Holographic grating recording in azobenzene functionalized polymers

2006 ◽  
Vol 4 (2) ◽  
pp. 266-284 ◽  
Author(s):  
Anna Sobolewska ◽  
Andrzej Miniewicz ◽  
Eugenia Grabiec ◽  
Danuta Sek
Keyword(s):  
Refractive Index ◽  
Absorption Coefficient ◽  
Polymer Matrix ◽  
Holographic Grating ◽  
Functionalized Polymers ◽  
Wave Mixing ◽  
Holographic Gratings ◽  
Two Wave Mixing ◽  
The Relationship ◽  
Azobenzene Groups

AbstractA group of 22 polymers have been synthesized to test their suitability for recording holographic gratings. Polyamides, polyimides, polyesters and their combinations were functionalized with pendant azobenzene groups containing single or double N=N. The polymers were studied using a standard degenerate two-wave mixing technique, which enables measurement of light-induced periodic modification of polymer refractive index and absorption coefficient by analysis of the diffracted light. Two qualitatively different configurations of the holographic polarization recording were used, s-s and s-p. The relationship between structural properties of polymer matrix and azobenzene groups and the holographic grating recording kinetics and light diffraction efficiency was investigated.

scholarly journals An application of reflective holographic gratings for measurement of cylindrical curvature

2021 ◽  
Vol 2145 (1) ◽  
pp. 012054
Author(s):  
Chanikan Inneam ◽  
Keerayoot Srinuanjan ◽  
Witoon Yindeesuk
Keyword(s):  
Laser Beam ◽  
Linear Relationship ◽  
Diffraction Pattern ◽  
Holographic Grating ◽  
Holographic Gratings ◽  
The Relationship

Abstract This paper presented an application of reflective holographic gratings for the measurement of cylindrical curvature. The surface of the fabricated holographic grating was coated with gold by the sputtering method, where it became a reflective holographic grating. The grating was attached to the surface of various radius cylindrical objects. The diffraction pattern produced by the bent grating with different radius was observed by illuminating a laser beam normal to the grating surface. The gratings constant were calculated from the observed diffraction pattern. The relationship between the grating constants and the radius of cylindrical objects was obtained. The grating constant and the reciprocal of the radius of cylindrical objects was a linear relationship, with the least R-square between 0.85-0.97. Moreover, the y-intercept of the relationship between the grating constants and the reciprocal radius was consistent with the grating constant of the non-bended grating. As the radius of the grating approach is infinite, the reciprocal of the radius approaches zero, which is a non-bend grating. We can apply this method to measure the radius of cylindrical objects.

Resonant two-wave mixing of optical beams by refractive-index and gain gratings in inverted Nd:YAG

1998 ◽  
Vol 15 (8) ◽  
pp. 2276 ◽  
Author(s):  
O. L. Antipov ◽  
S. I. Belyaev ◽  
A. S. Kuzhelev ◽  
D. V. Chausov
Keyword(s):  
Refractive Index ◽  
Wave Mixing ◽  
Two Wave Mixing ◽  
Optical Beams

Homodyne detection of ultrasonic surface displacements using two-wave mixing in photorefractive polymers

1999 ◽  
Author(s):  
Marvin B. Klein ◽  
Gerald D. Bacher ◽  
Anders Grunnet-Jepsen ◽  
Daniel Wright ◽  
William E. Moerner
Keyword(s):  
Wave Mixing ◽  
Homodyne Detection ◽  
Surface Displacements ◽  
Photorefractive Polymers ◽  
Two Wave Mixing

Impact of donor compensation ratio on photorefractive two–wave mixing dynamics in multiple quantum wells structures

2014 ◽  
Vol 23 (03) ◽  
pp. 1450029 ◽  
Author(s):  
Błażej Jabłoński
Keyword(s):  
Quantum Wells ◽  
Concentration Ratio ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Wave Mixing ◽  
Compensation Ratio ◽  
Mixing Dynamics ◽  
Two Wave Mixing ◽  
Charge Field ◽  
The Impact

The kind of defects and their concentration have a significant impact on photorefractive phenomena taking place within the structure of semi-insulating GaAs / AlGaAs multiple quantum wells. In this paper, the impact of donor-to-acceptor concentration ratio on the grating in photorefractive two-waves mixing was examined. The formation of the space charge field for different defect concentrations as well as different external electric field intensities are analyzed.

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