Modeling self-pulsating DFB lasers with an integrated phase tuningsection

摘要

A theoretical model of a self-pulsating three-section DFB lasernwith an integrated phase tuning section is established. It is based onntraveling wave equations and the standard carrier rate equations.nParameters of an existing device are used for applying the model. Keynconditions and characteristics of self-pulsations (SPs) are modeled andncompared with experimental results. The important role of phase tuningnfor turning on the SP is pointed out. The dependence of the SP regime onnthe detuning between the Bragg wavelengths in the laser and reflector isndetermined and the essential role of phase-readjustment is identified.nFrequency tuning via the laser currents, as well as the pulse shape atnvarious frequencies, is investigated. This allows us to identify thenmechanism for frequency tuning. The model turns out to be a good tool tonimprove our knowledge of the self-pulsation effect and to designnoptimized devices