ATOP Dyes. Optimization of a Multifunctional Merocyanine Chromophore for High Refractive Index Modulation in Photorefractive Materials

2001 ◽  
Vol 123 (12) ◽  
pp. 2810-2824 ◽  
Author(s):  
Frank Würthner ◽  
Sheng Yao ◽  
Joachim Schilling ◽  
Rüdiger Wortmann ◽  
Mesfin Redi-Abshiro ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Refractive Index Modulation ◽  
Photorefractive Materials ◽  
Index Modulation

scholarly journals Analysis of Long Period Gratings Inscribed by CO2 Laser Irradiation and Estimation of the Refractive Index Modulation

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6409
Author(s):  
Ana M. Rocha ◽  
Ana I. Machado ◽  
Telmo Almeida ◽  
Joana Vieira ◽  
Margarida Facão
Keyword(s):  
Refractive Index ◽  
Laser Irradiation ◽  
Refractive Index Change ◽  
Coupling Model ◽  
High Refractive Index ◽  
Refractive Index Modulation ◽  
Index Change ◽  
Long Period ◽  
Long Period Gratings ◽  
Index Modulation

Long period gratings (LPGs) inscribed in single mode fibers (SMFs) using CO2 laser irradiation were modelled numerically using the coupled mode method. The model considers the specifications of the inscription technique, such as the shape of the refractive index modulation that mimics the circularly symmetric point-to-point laser irradiation profile. A simple expression for predicting the resonant wavelength was obtained assuming a two-mode coupling model. However, to explain the spectra of the experimental LPGs, it was necessary to assume a reasonably high refractive index change and a multimode coupling model. Furthermore, using the developed model and a genetic algorithm to fit experimental resonances to simulated ones, we were able to estimate the maximum refractive index change, obtaining a value of 2.2 × 10−3, confirming the high refractive index change. The proposed model also predicts a second order resonance for this high value of refractive index change that was confirmed experimentally. Hence, with this model, we found some significant differences in the LPGs behavior when compared with conventional ones, namely, the emergence of coupling between different cladding modes and the competition of first and second order resonances which change the LPG transmission spectrum.

Optical properties of a photopolymer with large refractive index modulation for holographic application

2004 ◽  
Author(s):  
Chang-Won Shin ◽  
Nam Kim ◽  
Won-Sun Kim ◽  
Yong-Cheol Jeong ◽  
Jung-Ki Park
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Refractive Index Modulation ◽  
Index Modulation

scholarly journals Wavelength selective refractive index modulation in a ROMP derived polymer bearing phenyl- and ortho-nitrobenzyl ester groups

2013 ◽  
Vol 1 (25) ◽  
pp. 3931 ◽  
Author(s):  
Matthias Edler ◽  
Stefan Mayrbrugger ◽  
Alexander Fian ◽  
Gregor Trimmel ◽  
Simone Radl ◽  
...  
Keyword(s):  
Refractive Index ◽  
Refractive Index Modulation ◽  
Polymer Bearing ◽  
Index Modulation
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