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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

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4 Author(s)
Parra-Cetina, J. ; Res. Inst. for Networks & Commun. Eng. (RINCE), Dublin City Univ. (DCU), Dublin, Ireland ; Latkowski, S. ; Maldonado-Basilio, R. ; Landais, P.

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.

Published in:

Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 9 )