Open AccessРабочие характеристики полупроводниковых лазеров на квантовых ямах в зависимости от ширины волноводной области
Author(s) -
З.Н. Соколова,
Н.А. Пихтин,
С.О. Слипченко,
Л.В. Асрян
Publication year - 2021
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2021.12.51711.9721
Subject(s) - cladding (metalworking) , quantum well , laser , differential gain , optoelectronics , optics , materials science , current density , semiconductor laser theory , optical power , physics , quantum mechanics , metallurgy
Operating characteristics of semiconductor quantum well (QW) lasers are theoretically studied in terms of the thickness of the waveguide region [optical confinement layer (OCL)]. We calculate the maximum modal gain, optical confinement factor (in QW, OCL, and cladding layers), threshold current density, electron and hole densities (in QW and OCL), internal optical loss (in QW, OCL, and cladding layers), internal differential quantum efficiency, stimulated and spontaneous recombination currents, and output optical power of the laser as functions of the OCL thickness. It is shown that up to the pump current density 50 kA/cm2 the output power of the considered lasers depends only slightly on the OCL thickness in the range of thicknesses 1.5–2.8 m. This result is important for designing high brightness lasers as broadened waveguides are used in such lasers to attain low beam divergence. At high pump current densities, the output power is shown to have a maximum as a function of the OCL thickness.