Wavelength locking of silicon photonics multiplexer for DML-based WDM transmitter

We present a wavelength locking platform enabling the feedback control of silicon (Si) microring resonators (MRRs) for the realization of a 4 × 10 Gb/s wavelength-division-multiplexing (WDM) transmitter. Four thermally tunable Si MRRs are employed to multiplex the signals generated by four directly...

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Bibliographic Details
Published in:Journal of Lightwave Technology
Main Authors: Grillanda, Stefano, Ji, Ruiqiang, Morichetti, Francesco, Carminati, Marco, Ferrari, Giorgio, Guglielmi, Emanuele, Peserico, Nicola, Annoni, Andrea, Dede, Alberto, Nicolato, Danilo, Vannucci, Antonello, Klitis, Charalambos, Holmes, Barry, Sorel, Marc, Fu, Shengmeng, Man, Jiangwei, Zeng, Li, Sampietro, Marco, Melloni, Andrea
Format: Article in Journal/Newspaper
Language:English
Published: IEEE 2017
Subjects:
DML
Online Access:http://eprints.gla.ac.uk/139989/
http://eprints.gla.ac.uk/139989/1/139989.pdf
Description
Summary:We present a wavelength locking platform enabling the feedback control of silicon (Si) microring resonators (MRRs) for the realization of a 4 × 10 Gb/s wavelength-division-multiplexing (WDM) transmitter. Four thermally tunable Si MRRs are employed to multiplex the signals generated by four directly modulated lasers (DMLs) operating in the L-band, as well as to improve the quality of the DMLs signals. Feedback control is achieved through a field-programmable gate array controller by monitoring the working point of each MRR through a transparent detector integrated inside the resonator. The feedback system provides an MRR wavelength stability of about 4 pm (0.5 GHz) with a time response of 60 ms. Bit error rate (BER) measurements confirm the effectiveness and the robustness of the locking system to counteract sensitivity degradations due to thermal drifts, even under uncooled operation conditions for the Si chip.

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