Title :
Dynamics of all-optical clock recovery using two-section index- and gain-coupled DFB lasers
Author :
Kim, Inwoong ; Kim, Cheolhwan ; LiKamWa, Patrick L. ; Li, Guifang
Author_Institution :
Coll. of Opt. & Photonics/Center for Res. & Educ. in Opt. & Lasers, Univ. of Central Florida, Orlando, FL, USA
fDate :
4/1/2005 12:00:00 AM
Abstract :
The dynamics of coherent clock recovery (CR) using self-pulsing two-section distributed feedback (TS-DFB) lasers have been investigated. Both simulation and experimental results indicate fast lockup and walk-off of the clock-recovery process on the order of nanoseconds. Phase stability of the recovered clock from a pseudorandom bit sequence (PRBS) signal can be achieved by limiting the detuning between the frequency of free-running self-pulsation and the input bit rate. The simulation results show that all-optical clock recovery using TS-DFB lasers can maintain a better than 5% clock phase stability for large variations in power, bit rate, and optical carrier frequency of the input data and therefore is suitable for applications in optical packet switching.
Keywords :
distributed feedback lasers; high-speed optical techniques; laser tuning; light coherence; optical communication equipment; random sequences; semiconductor lasers; synchronisation; all-optical clock recovery; clock phase stability; coherent clock recovery; gain-coupled DFB lasers; optical carrier frequency; optical packet switching; pseudorandom bit sequence; self-pulsing two-section distributed feedback lasers; Bit rate; Chromium; Clocks; Distributed feedback devices; Frequency; Laser feedback; Laser stability; Optical feedback; Optical packet switching; Power lasers; Carrier-suppressed return-to-zero (CSRZ); distributed feedback (DFB) laser; injection locking; laser dynamics; laser model; optical clock recovery;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.844211
