Title :
A tractable above-threshold model, for the design of DFB and phase-shifted DFB lasers
Author :
Orfanos, I. ; Sphicopoulos, Thomas ; Tsigopoulos, A. ; Caroubalos, C.
Author_Institution :
Electron. Lab., Athens Univ., Greece
fDate :
4/1/1991 12:00:00 AM
Abstract :
A model, based on the transfer matrix method, and extended to above-threshold conditions in order to be used in the analysis and design of distributed feedback (DFB) structures, is presented. It provides the oscillation parameters as lasing frequency and net material gain, the linewidth estimation and output power, the photon density, carrier density, and effective refractive index profiles. This model can be used with or without facet reflectivities and with a number of symmetric or asymmetric phase shifts. It takes into account nonuniform envelope material gain and nonuniform index saturation. It is easily adaptable to any structure modifications
Keywords :
carrier density; distributed feedback lasers; laser theory; optical saturation; refractive index; semiconductor junction lasers; spectral line breadth; carrier density; diode lasers; distributed feedback; effective refractive index profiles; facet reflectivities; lasing frequency; linewidth estimation; net material gain; nonuniform envelope material gain; nonuniform index saturation; oscillation parameters; phase shifts; phase-shifted DFB lasers; photon density; tractable above-threshold model; transfer matrix method; Distributed feedback devices; Frequency estimation; Gratings; Laser feedback; Laser modes; Laser theory; Masers; Optical design; Optical materials; Optical resonators;
Journal_Title :
Quantum Electronics, IEEE Journal of
