Optimisation of waveguide parameters of laser InGaAs/AlGaAs/GaAs heterostructures for obtaining the maximum beam width in the resonator and the maximum output power

Comparative theoretical and experimental studies of two designs of high-power diode lasers

“…Several techniques to improve P out and η c have been summarized in [1]. One technique is based on an optimization of the vertical design by using highly asymmetric structures minimizing the thickness of the p-waveguide core, as suggested by other authors, too [5][6][7][8][9][10][11][12]. The advantages of a thin p-waveguide core are the reduction of the electrical series resistance, the optical losses and the voltage-driven leakage currents minimizing the power saturation effects observed even under pulsed conditions at high injection currents.…”

High-Performance Low-Divergence Angled Laser Diodes With Two-Dimensionally Tilted Sidewalls

“…Plenty of structures have been presented to reduce the transverse far-field angle, such as the asymmetric waveguide [6], the large optical cavity structure [7], [8], the passive far-field reduction layer (FRL) [9] and the longitudinal photonic band crystal (PBC) waveguide [10], and the narrowest angle achieved is about 5° [10]. However, these designs are all based on the introduction of additional layers below Manuscript the quantum wells (QWs), which need precisely modification of the epitaxial structure and may affect the growth quality of the QWs.…”

A Stable Numerical Algorithm for Investigating the Properties of Two-Dimensional Laser Waveguides in Multilayer Quantum-Dimensional Semiconductor Heterostructures

“…Thus, the ultrasmall thickness of the layers in combination with a large number of interfaces between the layers and the alternation of layers of different materials leads to the appearance of multilayer nanostructures with unique structural features that are not present in the materials that make up the nanostructures in massive samples [1]. The manifestation of such features is associated with the detection of such physical properties in multilayer nanostructures as extremely high hardness [2], low transverse thermal conductivity [3], the effect of giant magnetoresistance (GMR) [4], divergence of the radiative characteristics of heterolasers with increasing temperature [5][6][7][8], etc.…”

“…Heteronanolasers have high radiative characteristics and different variants, for example, strained quantum-dimensional heterostructures, which are currently being actively investigated [5][6][7][8][9][10].…”