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5 articles for “Birefringence”
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Phase Transition and Molecular Orientational Studies on Nematic Dimmer and Cholesteric Materials
Abstract: The binary mixture of nematic dimmer and cholesteric compounds viz., cholesteryl nonanoate (CN) and 1,7-bis-4-(4′-cyanobiphenyl) heptane (CB7CB) exhibits very interesting liquid crystalline phase’s at large range of concentrations and temperature. The concentrations with lower/higher percentage of CB7CB exhibit cholesteric and reentrant smectic-A phases sequentially when the specimen is cooled from its isotropic phase. The molecular tilt and birefringence have been discussed in the region of smetic-A and smectic-C phases, respectively …
Published in Research & Reviews : Journal of Physics · Vol. 7, Issue 1, 2018 · pp. 1–4 Read article
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An Optimized Configuration of Photonic Crystal Fiber (PCF) for High Birefrigent and Low Loss Application using FDTD Method
Abstract: AbstractTwo simplified structures are theoretically designed for high birefringence and low loss guiding photonic crystal fiber at operating wavelength 1.55 µm. The effective index, birefringence and confinement loss are obtained using finite difference time domain method. Simulation result shows that the maximum modal birefringence is equal to 86.33x10-5 for one configuration and lowest confinement loss in another configuration is nearly equal to 0.70x10-2 dB/Km at same operating wavelength.Keyword: birefringence, FDTD …
Published in Trends in Opto-electro & Optical Communication · Vol. 3, Issue 3, 2013 · pp. 1–8 Read article
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Using FEA Simulation and Photoelasticity Techniques to observe Integrated Stress Pattern for Transparent Polycarbonate Rectangular Specimen having Arc Feature
Abstract: In the fields of mechanics and materials science, photoelasticity is a reliable experimental method that provides a visual evaluation and analysis of the distribution of stress in materials that are transparent or translucent. This non-destructive testing technique uses the special property of materials known as birefringence, or double refraction, to visualise stress on a model under load. The process involves building a physical model that mimics real-world structures, applying mechanical …
Published in Journal of Polymer & Composites · Vol. 12, Issue 3, 2024 · pp. 55–63 Read article
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Integrated Analysis of Stress Patterns in Transparent Polycarbonate Specimens: A Comparative Study between Photoelasticity and FEA Simulation for Compact Circular Testing
Abstract: Photoelasticity stands as a robust experimental technique within the realms of mechanics and materials science, offering a means to visually assess and analyze stress distribution within materials possessing transparency or translucency. This method, a non-destructive testing approach, involves the visualization of stress on a model subjected to a load, leveraging the unique property of materials known as birefringence or double refraction. The procedure entails the careful selection of a suitable …
Published in Journal of Polymer & Composites · Vol. 12, Issue 4, 2024 · pp. 79–87 Read article
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Thermal Effects in High-Power Laser Systems: Modeling and Mitigation
Abstract: High-power laser systems are increasingly employed in industrial manufacturing, defense, medical procedures, and scientific research due to their ability to deliver high energy density with excellent spatial coherence. However, the performance and reliability of these systems are significantly influenced by thermal effects arising from optical absorption, non-radiative recombination, and inefficient heat dissipation within laser gain media and optical components. These thermal phenomena lead to adverse effects such as thermal lensing, …
Published in International Journal of Manufacturing and Production Engineering · Vol. 3, Issue 2, 2025 · pp. 9–13 Read article