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Effects of 946-nm thermal shift and broadening on Nd^(3+):YAG laser performance

Chinese Physics B 2015年第12期24卷 342-345页

作者： Seyed Ebrahim Pourmand Ghasem Rezaei Department of Optics and Laser Engineering Estahban Branch Islamic Azad University Department of Physics College of Sciences Yasouj University

Spectroscopic properties of flashlamp pumped Nd^3＋：YAG laser are studied as a function of temperature in a range from-30℃ to 60℃. The spectral width and shift of quasi three-level 946.0-nm inter-Stark emission within the respective intermanifold transitions of ^4F3/2→^4I9/2are investigated. The 946.0-nm line shifts toward the shorter wavelength and broadens. In addition, the threshold power and slope efficiency of the 946.0-nm laser line are quantified with *** lower the temperature, the lower the threshold power is and the higher the slope efficiency of the 946.0-nm laser line is,thus the higher the laser output is. This phenomenon is attributed to the ion-phonon interaction and the thermal population in the ground state.

关键词： 946-nm Nd:YAG laser thermal broadening thermal shift flashlamp pump slope efficiency threshold power

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Improved Ligand-Field Theoretical Calculations of R-Line thermal broadenings of MgO:Cr^(3+) and MgO:V^(2+)

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Communications in Theoretical Physics 2008年第11期50卷 1245-1248页

作者： ZHANG Zheng-Jie MA Dong-Ping Department of Physics Chengdu University of Technology Chengdu 610059 China Department of Applied Physics Sichuan University Chengdu 610065 China

With the values of parameters obtained from improved ligand-field theory,by taking into account all theirreducible representations and their components in EPI as well as all the levels and the admixtures of basic wavefunc-tions within d^3 electronic configuration,the R-line thermal broadenings(TB)of both MgO:Cr^(3+)and MgO:V^(2+)havemicroscopic-theoretically been *** results are in very good agreement with the experimental *** is foundthat the R-line TB of MgO:Cr^(3+)or MgO:V^(2+)comes from the first-order term of *** elastic Raman scattering ofacoustic phonons plays a dominant role in R-line TB of MgO:Cr^(3+)or MgO:V^(2+).

关键词： improved ligand-field theory electron-phonon interaction R line thermal broadening elastic Raman scattering

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broadening thermal Energy Levels and Density States Quasi One-Dimensional Electron Gas

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Journal of Applied Mathematics and Physics 2016年第4期4卷 706-710页

作者： P. J. Baymatov A. G. Gulyamov A. B. Davlatov B. B. Uzakov Namangan State University Namangan Uzbekistan Physico-Technical Institute Academy of Sciences of Uzbekistan Tashkent Uzbekistan Namangan Engineering-Pedagogical Institute Namangan Uzbekistan

We have investigated the energy states of a one-dimensional electron gas and analyzed the temperature dependence of the density of states. It is shown that with increasing temperature due to thermal broadening of quan... 详细信息

关键词： Quasi One-Dimensional Electron Gas Density of States thermal broadening

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Effect of Temperature and Band Nonparabolicity on Density of States of Two Dimensional Electron Gas

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Journal of Applied Mathematics and Physics 2016年第2期4卷 272-278页

作者： G. Gulyamov P. J. Baymatov B. T. Abdulazizov Namangan Engineering—Pedagogical Institute Namangan Uzbekistan Namangan State University Namangan Uzbekistan

The analysis of the density of states for electrons in single quantum well, the conduction band nonparabolicity take is account. It is shown that the degree of conduction band nonparabolicity pronounces depending on the energy density of states. With increasing temperature, a step change in the density of states smoothes and at high temperatures is completely blurred. Nonparabolicity dispersion law manifests itself in a wide range of temperatures. Calculations are carried out for the example of the quantum wells in InAs and InSb.

关键词： Quantum Well Density of States Band Nonparabolicity thermal broadening

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