Title :
Self-consistent Simulation of self-pulsating two-section gain-coupled DFB lasers
Author :
Al-Mumin, Mohammed A. ; Li, Guifang
Author_Institution :
Coll. of Technol. Studies, Shuwaikh, Kuwait
fDate :
4/1/2005 12:00:00 AM
Abstract :
The role of cavity conditions in the dynamics of two-section gain-coupled distributed feedback (DFB) lasers is investigated using a self-consistent model. Self-sustained pulsation (SSP) exists only for devices with strongly coupled DFB gratings. As the coupling strength increases, multiple SSP regimes are developed. The SSP frequency tuning range increases as cavity length decreases. The frequency and modulation index predicted by the model agree well with experimental results. The facet condition of each section is found to affect SSP differently because of the asymmetrical behavior of the modes responsible for SSP.
Keywords :
diffraction gratings; distributed feedback lasers; laser cavity resonators; laser modes; laser theory; laser tuning; optical modulation; semiconductor device models; DFB lasers; asymmetrical mode behavior; cavity length; coupled DFB gratings; coupling strength; frequency index; frequency tuning; gain-coupled lasers; modulation index; self-consistent model; self-consistent simulation; self-pulsating lasers; self-sustained pulsation; two-section lasers; Distributed feedback devices; Frequency; Laser feedback; Laser modes; Laser tuning; Masers; Optical feedback; Optical refraction; Optical sensors; Optical variables control; Distributed feedback (DFB) lasers; facet conditions; gain-coupling; microwave generation; optical clock recovery; self-pulsations;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2005.843617
