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High speed transmission over multimode fiber with direct modulated single-mode VCSEL

: Caspar, C.; Kropp, J.-R.; Shchukin, V.A.; Ledentsov, N.N.; Jungnickel, V.; Freund, R.

Informationstechnische Gesellschaft im VDE:
Breitbandversorgung in Deutschland : Beiträge der 9. ITG-Fachkonferenz, 20. – 21. April 2015 in Berlin
Berlin: VDE-Verlag, 2015 (ITG-Fachbericht 256)
ISBN: 978-3-8007-3925-7
Fachkonferenz Breitbandversorgung in Deutschland <9, 2015, Berlin>
Conference Paper
Fraunhofer HHI ()

In current data centers, most of optical links are based on vertical-cavity surface-emitting lasers (VCSEL) operating at 850 nm over multimode optical fiber. The demand for increasing data rates implies a decrease of link reach length. For example, at current standards 25-Gbit/s-links are limited to 100 m. In this paper, we still demonstrate successful transmission at 25 Gbit/s over 1 km of multi-mode fiber by using an optimized VCSEL structure with a single primary mode. This indicates that the relative low cost VCSEL-technology is still capable to fulfill the future bandwidth requirements in data centers. Furthermore this new technology has the capability to be an option for the future in-house distribution networks or to connect the end-user within the last mile.