Title :
A new method for the calculation of the emission spectrum of DFB and DBR lasers
Author :
Weber, Jean-Pierre ; Wang, Shyh
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
10/1/1991 12:00:00 AM
Abstract :
A method based on transmission matrices that allows the emission spectra of arbitrarily complicated semiconductor laser structures to be computed below and above threshold has been developed. These can include active and passive periodic or uniform sections. As examples, the authors compute the emission spectra of a normal distributed feedback (DFB) laser, a DFB laser with a λ/4 phase shifter, and a surface-emitting distributed Bragg reflector (DFB) laser. To do that, Petermann´s method for calculating the spontaneous emission coupling coefficient has been extended to the case of a periodic waveguide. It is shown how the spontaneous emission, when treated correctly, can be used to measure the coupling coefficient of the grating in a DFB laser with a λ/4 phase shifter
Keywords :
distributed Bragg reflector lasers; distributed feedback lasers; laser theory; semiconductor junction lasers; DBR lasers; DFB laser; Petermann´s method; active; diffraction gratings; distributed feedback; emission spectrum; grating; passive periodic; periodic waveguide; phase shifter; semiconductor laser structures; spontaneous emission coupling coefficient; surface-emitting distributed Bragg reflector; threshold; transmission matrices; uniform sections; Distributed computing; Distributed feedback devices; Laser feedback; Phase shifters; Semiconductor lasers; Spontaneous emission; Surface emitting lasers; Surface treatment; Transmission line matrix methods; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
