Title :
Two-dimensional rectangular lattice distributed feedback lasers: A coupled-mode analysis of TE guided modes
Author :
Han, H. ; Coleman, J.J.
Author_Institution :
Mater. Res. Lab., Illinois Univ., Urbana, IL, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
Two-dimensional rectangular lattice distributed feedback lasers in a waveguide geometry are described by a coupled-mode analysis of a scalar wave equation derived from a vector field for TE guided modes. A detailed analysis is provided for a two-dimensional grating which allows the method of separation of variables for the scalar wave equation so that the threshold conditions are described by those of two orthogonal one-dimensional gratings. We present the correct definitions of threshold gain and detuning of the two-dimensional distributed feedback laser, and also the optimum design conditions for the minimization of the threshold gain. It is found that there is an optimum structural angle for the given area and periods of the two-dimensional grating
Keywords :
coupled mode analysis; diffraction gratings; distributed feedback lasers; geometry; laser feedback; laser modes; laser theory; semiconductor lasers; waveguide lasers; 2D rectangular lattice distributed feedback lasers; TE guided modes; coupled-mode analysis; detuning; optimum design conditions; optimum structural angle; orthogonal one-dimensional gratings; scalar wave equation; semiconductor lasers; separation of variables; threshold conditions; threshold gain; two-dimensional distributed feedback laser; two-dimensional grating; vector field; waveguide geometry; Coupled mode analysis; Distributed feedback devices; Geometrical optics; Gratings; Laser feedback; Laser modes; Lattices; Partial differential equations; Rectangular waveguides; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
