Abstract
A time domain model is used to study the large signal dynamics of general Bragg-detuned cavities. Such structures, in which the grating pitch is spatially nonuniform so that a distributed phase shift is produced along the cavity, are often called corrugation-pitch-modulated distributed feedback lasers (CPM-DFB). Furthermore, by introducing a longitudinally dependent coupling coefficient /spl kappa/, a corrugation-pitch-modulated distributed-coupling-coefficient DFB laser (CPM-DCC-DFB) with quite different spectral properties can be realized. We present in this paper a comparison between these two kinds of components. It is shown that an adequate profile of the coupling coefficient (stronger coupling at the center of the cavity) in a CPM-DCC-DFB structure can help to achieve better steady-state singlemode operation with respect to conventional CPM-DFB lasers (uniform coupling coefficient). However, in CPM-DCC-DFB lasers, side modes are liable to be excited during the turn-on transient interval, thus imposing a limitation to the modulation depth requirement.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
