The Experts below are selected from a list of 255 Experts worldwide ranked by ideXlab platform
Philippe Roy - One of the best experts on this subject based on the ideXlab platform.
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experimental and numerical characterization of a hybrid fabry perot cavity for temperature sensing
Sensors, 2015Co-Authors: Aitor Lopezaldaba, A. M. R. Pinto, Jose Manuel Baptista, José Luis Santos, M Lopezamo, Jean-louis Auguste, Raphael Jamier, Hardy Baierl, Orlando Frazão, Philippe RoyAbstract:A hybrid Fabry-Perot cavity sensing head based on a four-bridge microstructured fiber is characterized for temperature sensing. The characterization of this cavity is performed numerically and experimentally in the L-band. The sensing head output signal presents a Linear Variation with temperature changes, showing a sensitivity of 12.5 pm/°C. Moreover, this Fabry-Perot cavity exhibits good sensitivity to polarization changes and high stability over time.
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Experimental and Numerical Characterization of a Hybrid Fabry-Pérot Cavity for Temperature Sensing
Sensors, 2015Co-Authors: Aitor Lopez-aldaba, A. M. R. Pinto, Jose Manuel Baptista, José Luis Santos, Jean-louis Auguste, Raphael Jamier, Hardy Baierl, Orlando Frazão, Manuel Lopez-amo, Philippe RoyAbstract:A hybrid Fabry-Pé rot cavity sensing head based on a four-bridge microstructured fiber is characterized for temperature sensing. The characterization of this cavity is performed numerically and experimentally in the L-band. The sensing head output signal presents a Linear Variation with temperature changes, showing a sensitivity of 12.5 pm/° C. Moreover, this Fabry-Pé rot cavity exhibits good sensitivity to polarization changes and high stability over time.
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Characterization of a hybrid Fabry-Perot Cavity based on a four-bridge double-Y-shape-core microstructured fiber
2014Co-Authors: Ana Pinto, Jose Manuel Baptista, José Luis Santos, Jean-louis Auguste, Raphael Jamier, Hardy Baierl, Orlando Frazão, Aitor Lopez-aldaba, Manuel Lopez-amo, Philippe RoyAbstract:In this work, a hybrid Fabry-Perot interferometer based on a novel four-bridge microstructured fiber is presented and characterized. The characterization of this cavity is performed in the L-band using two different instruments: an optical spectrum analyzer and an optical backscatter reflectometer. The Fabry-Perot output signal presents Linear Variation with temperature changes (sensitivity 9.8-11.9 pm/ºC), Variation with the polarization states of light and high stability.
Souradip Chattopadhyay - One of the best experts on this subject based on the ideXlab platform.
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Long wave instability of thin film flowing down an inclined plane with Linear Variation of thermophysical properties for very small Biot number
International Journal of Non-Linear Mechanics, 2018Co-Authors: Anandamoy Mukhopadhyay, Souradip ChattopadhyayAbstract:Abstract We investigated interfacial instability of a thin liquid film flowing down an inclined plane, considering the Linear Variation of fluid properties such as density, dynamical viscosity, surface tension and thermal diffusivity, for the small Variation of temperature. Using long wave expansion method and considering order analysis specially for very small Biot number ( B i ) we obtained a single surface equation in terms of the free surface h ( x , t ) . Considering sinusoidal perturbation method we carried out Linear stability analysis and obtained the critical Reynolds number ( R e c ) and Linear phase speed ( c r ) , both of which depend on K μ , K ρ but independent of K σ , K κ . Using the method of multiple scales, weakly nonLinear stability analysis is carried out. We demarcated subcritical, supercritical, unconditional and explosive zones and their Variations for the Variation of K μ , K ρ and K σ . Also we discussed the Variations of threshold amplitude in the subcritical as well as in the supercritical zones for the Variation of K μ , K ρ and K σ . Finally we discussed the Variation of nonLinear wave speed N c r for the Variation of K μ , K ρ and K σ .
Hamit Yurtseven - One of the best experts on this subject based on the ideXlab platform.
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A Linear Variation of the thermal expansivity with the isothermal compressibility for ammonia solid III near the melting point
Korean Journal of Chemical Engineering, 2010Co-Authors: Hamit Yurtseven, Onder CaglarAbstract:The thermal expansivity αp is related to isothermal compressibility κT at various pressures for constant temperatures of 254.6, 274 and 297.5 K close to the melting pressure in ammonia solid III. By analyzing the experimental data for κT according to a power-law formula, a Linear Variation of αp with the κT is established here close to the solid-liquid transition in ammonia. Anomalous behavior of thermal expansivity αp and the isothermal compressibility κT near the melting pressure is indicative of the λ-type transition in ammonia solid III.
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Linear Variations of the thermodynamic quantities in the liquid phase of carbon tetrachloride close to the melting point
Journal of Molecular Liquids, 2007Co-Authors: Hamit Yurtseven, D. KavrukAbstract:Abstract We verify here a Linear Variation of the specific heat Cp with the thermal expansivity αp and also a Linear Variation of αp with the isothermal compressibility κT for the liquid phase of carbon tetrachloride close to the melting point. Linear relations (Pippard relations) are verified by analyzing the experimental data for the thermal expansivity αp at various pressures in the liquid phase of CCl4 close to the melting point. Our Linear plots of Cp against αp and also αp against κT give the values of the slope dPm/dT as ~ 8.5MPa/K and 9.5MPa/K, respectively, which can be compared with the experimental value obtained from a P–T phase diagram close to the melting point in carbon tetrachloride.
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A Linear Variation of the thermal expansivity with frequency shifts for the translational mode in ammonia solid II near the melting point.
Spectrochimica acta. Part A Molecular and biomolecular spectroscopy, 2007Co-Authors: Hamit Yurtseven, H. KaracaliAbstract:Abstract We examine here our spectroscopic modification of the Pippard relation which is a Linear Variation of the thermal expansivity α p with the frequency shifts (1/ ν )(∂ ν /∂ p ) T close to the melting point in ammonia solid II. For this we use our calculated frequencies for the Raman mode of ν (51 cm −1 ) in ammonia solid II for the pressures of 3.65, 5.02 and 6.57 kbars. We establish this Linearity between α p and (1/ ν )(∂ ν /∂ p ) T for the pressures studied in ammonia solid II close to the melting point. The observed behaviour of ammonia solid II is explained in terms of our spectroscopic relation given here.
Sumit Kumar Vishwakarma - One of the best experts on this subject based on the ideXlab platform.
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Propagation of torsional surface waves in an inhomogeneous layer over an initially stressed inhomogeneous half-space
Journal of Vibration and Control, 2013Co-Authors: Shishir Gupta, Samapti Kundu, Sumit Kumar VishwakarmaAbstract:This paper has been framed to study the propagation of torsional surface waves in an inhomogeneous layer of finite thickness over an initially stressed inhomogeneous half-space. Rigidity, density and initial stress of the half-space are assumed to have Linear Variation, and in layers Linear Variation in rigidity and density are also considered. It has been observed that the inhomogeneity parameter and the initial stress play an important role for the propagation of the torsional surface wave. The method of separation of variables is applied to find the displacement field. The dispersion equation of phase velocity is derived. The velocities of torsional waves are calculated numerically as a function of kH and presented in a number of graphs, where k is the wave number, and H is the thickness of the layer. Graphical user interface has been developed using MATLAB to generalize the effect of the various parameters discussed. As a particular case it has been seen that the dispersion equation is in agreement wi...
Anandamoy Mukhopadhyay - One of the best experts on this subject based on the ideXlab platform.
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Long wave instability of thin film flowing down an inclined plane with Linear Variation of thermophysical properties for very small Biot number
International Journal of Non-Linear Mechanics, 2018Co-Authors: Anandamoy Mukhopadhyay, Souradip ChattopadhyayAbstract:Abstract We investigated interfacial instability of a thin liquid film flowing down an inclined plane, considering the Linear Variation of fluid properties such as density, dynamical viscosity, surface tension and thermal diffusivity, for the small Variation of temperature. Using long wave expansion method and considering order analysis specially for very small Biot number ( B i ) we obtained a single surface equation in terms of the free surface h ( x , t ) . Considering sinusoidal perturbation method we carried out Linear stability analysis and obtained the critical Reynolds number ( R e c ) and Linear phase speed ( c r ) , both of which depend on K μ , K ρ but independent of K σ , K κ . Using the method of multiple scales, weakly nonLinear stability analysis is carried out. We demarcated subcritical, supercritical, unconditional and explosive zones and their Variations for the Variation of K μ , K ρ and K σ . Also we discussed the Variations of threshold amplitude in the subcritical as well as in the supercritical zones for the Variation of K μ , K ρ and K σ . Finally we discussed the Variation of nonLinear wave speed N c r for the Variation of K μ , K ρ and K σ .
