Abstract
All-optical 3R (retiming, reshaping, reamplification) regeneration is expected to become a key enabling technology for 40 Gb/s long-haul transport systems. There are two basic building blocks for an all-optical 3R regenerator: a clock recovery circuitry and a nonlinear optical gate. We focus on technologies for all-optical recovery and provide an overview of mechanisms for nonlinear optical gating. We have demonstrated all-optical clock recovery using self-pulsing two-section gain-coupled distributed feedback (DFB) lasers. Self pulsation in two-section gain-coupled DFB lasers is a result of existence of two modes in one of the sections. Continuous tuning of self-pulsation frequencies from 11 to 120 GHz has been demonstrated by proper design of the laser structure. Three modes of clock recovery operation using the two-section DFB lasers are described. The nonlinear gating mechanisms that we briefly describe include cross-gain, cross-phase modulation using SOAs, cross-absorption modulation using electro-absorption modulation, and nonlinear directional coupling.
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.
