STATIC AND DYNAMIC PROPERTIES OF INGAASP-INP DISTRIBUTED-FEEDBACK LASERS - A DETAILED COMPARISON BETWEEN EXPERIMENT AND THEORY

We have investigated the static and dynamic characteristics of phase s hifted InGaAsP-InP DFB lasers mainly focusing on a comprehensive compa rison between experimental results and numerical simulations. Experime ntal data of InGaAsP-InP mushroom type DFB lasers have been recorded, such as optical spectra, variations of the mode wavelengths with conti nuous and pulsed injection current, side mode suppression ratio, relat ive intensity noise, small signal amplitude modulation, and the transi ent response to 10 and 15 Gb/s large signal modulation. The theoretica l model calculations in this paper are based on the transfer matrix me thod in combination with a rate equation analysis and take into accoun t longitudinal mode spatial hole burning which is modified by the inho mogeneous current injection resulting from the axially varying Fermi v oltage in both the static and the dynamic case. A good agreement betwe en the experimental data and the theoretical simulations has been obta ined extracting a set of parameters which consistently describes the m easurements of our devices.