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Artykuł poświęcony stratom energii w laserze z rezonatorem Fabry-Perota i typu zygzak w formie płaskiego graniastosłupa ściętego. Zawiera on skorygowane wartości strat dla lasera typu zygzak z rezonatorem zawierającym trzy zwierciadła. Oprócz materiałowych strat na absorpcję i rozpraszanie w ośrodku czynnym, uwzględniono również straty spowodowane wyciekiem promieniowania przez nieidealne zwierciadła...
We have considered the advantages of diode pumping of solid-state lasers with high-performance active medium. The article describes the design features of solid-state zigzag lasers based on a flat truncated prism. We have identified the range of the angles under which zigzag laser with small output beam transverse size can be obtained that significantly increases the output power density. It was shown...
For the quantum cascade structures based on extended Bastard model numerical calculations of the energy levels, wave functions, dipole matrix elements of optical transitions are carried out. In view of the complete energy levels set and in various models of the spectral broadening lines calculations of the gain coefficient are performed. The calculations of the spontaneous emission spectra using universal...
Theoretical explanation of magnetic field impact on terahertz radiation generation by femtosecond-laser-excited narrow band-gap semiconductors is proposed. Surface depletion electric field screening influence on terahertz emission by means of nonlinear optical rectification is analyzed. Free-carrier electro-optical effect in semiconductors in the presence of the constant electric field is investigated.
For asymmetric multiple-quantum-well heterostructures based on Ga1-xInxAsySb1-y/AlxGa1-xAsySb1-y semiconductors it is shown that a wide and almost flat waveguide gain spectrum can be obtained over the 2.3-2.84 mum spectral range. Main attention is devoted to the results obtained under study of spectral characteristics of two- and four- quantum-well structures with active region layers of different...
A novel approach to diode pumped solid state lasers (DPSSL) designing is investigated. It is proposed to develop two compact DPSSL for medical applications with improved output parameters - Tm:YVO4 and Ho:YAG DPSSL.
Numerical self-consistent calculations of the energy levels and wave functions for superlattice quantum cascade structure are performed. Theoretical model for the calculations of the injection coefficients at optical-phonon scattering are suggested
Numerical calculations of the energy levels and wave functions for superlattice quantum cascade structure with doped regions emitted in the middle infrared range are performed. The optimization of the layers thicknesses to receive smaller threshold current is made
In the paper, the influence of high doping on the energy spectrum and electron transport characteristics of n-i-p-i crystals is determined taking into account the Gaussian and exponential character of the fluctuated energy states. Influence of the impurity correlation on the D/mu ratio is examined in detail. Data of self-consistent calculations of the Schrodinger and Poisson's equations are presented...
Light-current and tuning characteristics of semiconductor injection lasers in an external cavity are analyzed. The active region of the lasers is an asymmetric multiple quantum-well heterostructure under conditions of non-uniform excitation. Such a design of laser diodes results in a wide-range tunable emission spectrum.
Summary form only given. Theoretical consideration by rate equations has shown that regimes of regular pulse generation at two or three remote optical wavelengths in the range of 790 to 850 nm can be realized in the GaAs-AlGaAs systems with bi- or triple quantum well heterostructure at suitable configuration and doping of active and barrier layers. Light pulse duration reaches values about 50 to 100...
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