Title :
Wavelength Tunability of All-Optical Clock-Recovery Based on Quantum-Dash Mode-Locked Laser Diode Under Injection of a 40-Gb/s NRZ Data Stream
Author :
Parra-Cetina, Josué ; Latkowski, Sylwester ; Maldonado-Basilio, Ramón ; Landais, Pascal
Author_Institution :
Res. Inst. for Networks & Commun. Eng. (RINCE), Dublin City Univ. (DCU), Dublin, Ireland
fDate :
5/1/2011 12:00:00 AM
Abstract :
Wavelength tunability of an all-optical clock recovery operation based on a quantum-dash mode-locked Fabry-Pérot laser diode is experimentally investigated. Synchronization of the device to the injection of 40-Gb/s nonreturn-to-zero (NRZ) incoming data is assessed by analyzing both the carrier-to-noise ratio and the linewidth of the 40-GHz beat-tones measured at the mode-locked laser output. Under optical injection, beat-tone linewidths below 10 Hz are measured. Recovered clock pulses featuring a width of 1.6 ps are obtained irrespective of the wavelength detuning between the laser spectra and the optical carrier of the incoming data stream.
Keywords :
laser mode locking; laser noise; laser tuning; quantum dash lasers; synchronisation; NRZ data stream; all-optical clock recovery; bit rate 40 Gbit/s; carrier-to-noise ratio; frequency 40 GHz; laser spectra; nonreturn-to-zero data stream; optical injection; quantum-dash mode locked Fabry-Pérot laser diode; wavelength tunability; Clocks; Laser mode locking; Optical amplifiers; Optical attenuators; Optical fibers; Semiconductor lasers; All-optical clock recovery; Fabry–Pérot laser; mode-locked laser; nonreturn-to-zero (NRZ); quantum dash;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2111366
