In this work, we have used a tunable VCSEL for high-speed optical data transmission. To obtain wide tunability, a MEMS-DBR is surface micromachined onto a short-cavity high-speed VCSEL operating at 1550 nm. Ultra-wide continuous tuning is realized with electro-thermal actuation of the MEMS with built-in stress gradient
within SiOx/SiNy dielectric layers. The MEMS-VCSEL operates in single-mode with SMSR > 40 dB across the entire tuning range. Quasi-error-free transmission of direct-modulation at record 15 Gbps is reported for 20 nm tuning, showing the potential towards the standard requirements for the SFP+ modules in the tail-ends of the WDM transmission system.
Sujoy Paul, Julijan Cesar, Mohammadreza Malekizandi, Mohammad T. Haidar, Niels Heermeier, Markus Ortsiefer, Christian Neumeyr, Christoph Gréus, Michael H. Eiselt, Irfan Ibrahim, Henning Schmidt, Jörg Schmidt, and Franko Küppers, "Towards a SFP+ module for WDM applications using an ultra-widely-tunable high-speed MEMS-VCSEL," Proc. SPIE 10122, Vertical-Cavity Surface-Emitting Lasers XXI, 1012209 (Presented at SPIE OPTO: February 02, 2017; Published: 25 February 2017); https://doi.org/10.1117/12.2252059.
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