Theory on distributed feedback /DFB/ lasers including strong modulations
Abstract
A general theory on distributed feedback lasers is developed which includes weak and strong periodic modulations. The theory is based on a complex Hill wave equation which is treated by matrix methods. An infinite DFB medium is modeled as an infinite chain of fourterminals, where each period of the DFB structure is represented by a fourterminal. The dispersion relation of the infinite DFB structure is obtained from the corresponding infinite chain of four terminals, while the resonance condition of a finite DFB laser is calculated from the corresponsing finite chain terminated by freespace impedances. It is shown that an approximation for weak modulations is compatible with the dispersion relation obtained using the coupledwave theory.
 Publication:

Lasers 1981
 Pub Date:
 1982
 Bibcode:
 1982lase.conf..390G
 Keywords:

 Distributed Parameter Systems;
 Feedback Frequency Modulation;
 Hill Method;
 Laser Outputs;
 Light Modulation;
 Bragg Angle;
 Distributed Feedback Lasers;
 Matrices (Mathematics);
 Optical Resonance;
 Power Gain;
 Refractivity;
 Wave Equations;
 Lasers and Masers