We present the results of Fourier-transform measurements for determination of refractive indices of four semiconductor alloys in the midinfrared spectral range from 10 to 300 K. We investigate double-sided-polished, u...
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We present the results of Fourier-transform measurements for determination of refractive indices of four semiconductor alloys in the midinfrared spectral range from 10 to 300 K. We investigate double-sided-polished, undoped InP and GaAs substrates as well as In0.53Ga0.47As/InP and AlAs/GaAs distributed Bragg reflector (DBR) mirrors with their operational wavelength designed for 4 µm. Through analysis of measured transmittance spectra supported by ellipsometry it is possible to determine the temperature-dependent refractive indices of InP and GaAs from 1.3 to 11 µm. Furthermore, by using reflectivity measurements supported by numerical modeling of the two types of designed DBR structures the refractive indices of In0.53Ga0.47As and AlAs for around 4 µm are determined with their temperature dependencies. Data acquired through this method could lead to improvement of already existing optical semiconductor devices expanding their application for longer wavelengths.
The proceedings contain 162 papers. The topics discussed include: evaluation and testing of semiconductor laser reliability in optic system;theoretical study of transient thermal nonlinear refraction induced by nonlin...
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ISBN:
(纸本)0819467278
The proceedings contain 162 papers. The topics discussed include: evaluation and testing of semiconductor laser reliability in optic system;theoretical study of transient thermal nonlinear refraction induced by nonlinear optical absorption;third-order nonlinear optical properties and optical limiting property of metallonapthalocyanine;nonlinear errors of passive homodyne polarized laser interferometer;interaction of partially coherent laser radiation with matter;conoscopic methods of optical crystal research;a novel all-fiber self-organization coherent erbium-doped fiber laser;thermal behavior of thin metal films irradiated by ultra-short pulse laser;laser generation and reception of acoustic ultrasonic waves in solids;transmission characteristic of photonic crystals coupler;study on trap states in polyvinylcarbazole by thermally stimulated current spectrum;and new self-developed holographic media-dichromated gelatin with isopropanol.
The proceedings contain 162 papers. The topics discussed include: evaluation and testing of semiconductor laser reliability in optic system;theoretical study of transient thermal nonlinear refraction induced by nonlin...
详细信息
ISBN:
(纸本)0819467278
The proceedings contain 162 papers. The topics discussed include: evaluation and testing of semiconductor laser reliability in optic system;theoretical study of transient thermal nonlinear refraction induced by nonlinear optical absorption;third-order nonlinear optical properties and optical limiting property of metallonapthalocyanine;nonlinear errors of passive homodyne polarized laser interferometer;interaction of partially coherent laser radiation with matter;conoscopic methods of optical crystal research;a novel all-fiber self-organization coherent erbium-doped fiber laser;thermal behavior of thin metal films irradiated by ultra-short pulse laser;laser generation and reception of acoustic ultrasonic waves in solids;transmission characteristic of photonic crystals coupler;study on trap states in polyvinylcarbazole by thermally stimulated current spectrum;and new self-developed holographic media-dichromated gelatin with isopropanol.
Long lasting service performance has been one of the most important qualities in high way engineering. In this paper, one type of strain sensor used for measuring and monitoring of asphalt pavement is presented and re...
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ISBN:
(纸本)9780819467270
Long lasting service performance has been one of the most important qualities in high way engineering. In this paper, one type of strain sensor used for measuring and monitoring of asphalt pavement is presented and relevant numeric analysis is introduced. Application of this kind of sensor in an express highway shows that the sensors based on Fiber Bragg Grating technique and their embedding craft are applicable.
The traveling salesman problem, which is one of combinatorial optimization problems, is solved by using two different methods: the Hopfield type network and the Kohonen type network. In the Hopfield type network the e...
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ISBN:
(纸本)0819467278
The traveling salesman problem, which is one of combinatorial optimization problems, is solved by using two different methods: the Hopfield type network and the Kohonen type network. In the Hopfield type network the energy function is defined, whose global minimum must be searched. The energy is shown analytically to decrease monotonically. The time behavior can be discussed analytically, because the input-output function is piecewise linear. The network can always find the optimum solution. In the Kohonen type network the modified version is proposed, in which the mechanism of choice of winner neuron is included automatically in the time evolution equation of the internal state. In usual Hopfield's network N × N neurons are needed to solve TSP with TV cities. It is shown that only N neurons are needed in modified Kohonen's network, which means that the network has a great advantage in the case of the application to TSP with higher number of cities or in the application to more complicated combinatorial optimization problems. The relation between the Hopfield type network and the modified Kohonen type network is discussed.
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