VI Systems touts 28-Gbps VCSEL reliability data

German high-speed laser supplier VI Systems GmbH says that a recent study confirms the reliability of its V25-850C4 4x1 vertical-cavity surface-emitting laser (VCSEL) array.

The study results are the subject of a paper published in Semiconductor Science and Technology (vol 28, no 6; paper available for download one month after the publication date). It reports failure-free operation of the chips for more than 6000 hours at 95^oC heat sink temperature at 5 mA drive current (with a current density of 18 kA/cm²). No degradation of the output power at the same current with time was observed, VI Systems adds.

Error-free operation at 25-Gbps at 5mA was demonstrated in a broad temperature range at a small penalty in the received power (~1 dB, 85^oC, as compared to room temperature), the company asserts.

EZconn a.s., a part of eGtran Corp., performed the degradation study and related data acquisition. Other partners in the study were Connector Optics LLC, A.F. Ioffe Physical-Technical Institute and the Technical University of Berlin.

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