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10th International Conference on Laser and Fiber-Optical Networks Modeling (LFNM 2010). 2nd IEEE International Workshop on THz Radiation: Basic Research and Applications (TERA 2010)
The main requirements for the MCT (CdxHg1-xTe) structures optimization for increase of the stimulated emission wavelength under optical pumping are discussed. The stimulated emission at wavelengths 2-2.5 μm at room temperature from optimized MCT structures is observed experimentally. The obtained experimental data are the first observation of stimulated emission from the MCT structures at these wavelengths...
Using numerical modeling, influence of tuning the lasing frequency within the gain band on the modulation response of quantum-well heterolasers in the GaInAs-GaInAsP system versus the modulation frequency of pump current is investigated. It is established that maximum values of the frequency width of the response band and possibilities of realization of high-speed regimes at signal transmission in...
Asymmetric multiple quantum well active regions for optically-pumped semiconductor disk lasers (OPS-DLs) are designed employing wave function engineering within GaAs/AlGaAs material system, which provide simultaneously good electronic confinement, large gain and effective carrier transport. Experimental investigation has shown that such an approach gives record values of the conversion efficiency...
As-grown ZnO:In crystalline plates demonstrate strong near-band-edge emission related to exciton recombination (380 nm - free excitons; 395 and 406 nm - excitons localized in the impurity centers). Fabry-Perot mode structure is observed for last two bands. Dramatically increasing narrow line (396 nm, Δλ ~ 3.3 nm) is connected with EHP recombination.
Stimulated emission from quantum dots arrays has been observed under optical pumping. The emission has been observed from the ground state for electrons (λ ≈ 1.31 μm) and from two higher levels (λ ≈ 1.21 μm, 1.12 μm). The measured values of the amplification coefficient are rather high, up to 15 ÷ 17 cm-1. Procedure of the amplification coefficient measurements in the active media has been discussed.
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