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Proceedings Paper

120 Gbps VCSEL arrays: fabrication and quality aspects
Author(s): Martin Grabherr; Steffan Intemann; Christian Wimmer; Lin R. Borowski; Roger King; Dieter Wiedenmann; Roland Jäger
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Paper Abstract

Data centers and supercomputers are driving the demand for short reach aggregate bandwidth. E.g. active CXP active optical cables (AOC) with an aggregate bandwidth of 120 Gbps [1] are being installed since about one year in some of the biggest server farms in the world. As these applications require parallel optics, obviously this is a natural playground for VCSEL technology. The 10G VCSEL platform of Philips ULM Photonics is enabling operation of such AOC at less than 3 W total power by low bias currents for the individual VCSEL as low as 3.4 mA at room temperature and 5.5 mA at 85°C ambient. In combination with ideally matched driver electronics, the launch power of the VCSELs can be stabilized within 0.15dB variation across this operating temperature range [2] and thus allow for open loop power control. With more than 108 hours of operation in the field and no field return reported, the FIT rate for the 1x12 VCSEL array can be calculated to be less than 10 FIT.

Paper Details

Date Published: 5 February 2010
PDF: 8 pages
Proc. SPIE 7615, Vertical-Cavity Surface-Emitting Lasers XIV, 761507 (5 February 2010); doi: 10.1117/12.841987
Show Author Affiliations
Martin Grabherr, Philips Technologie GmbH U-L-M Photonics (Germany)
Steffan Intemann, Philips Technologie GmbH U-L-M Photonics (Germany)
Christian Wimmer, Philips Technologie GmbH U-L-M Photonics (Germany)
Lin R. Borowski, Philips Technologie GmbH U-L-M Photonics (Germany)
Roger King, Philips Technologie GmbH U-L-M Photonics (Germany)
Dieter Wiedenmann, Philips Technologie GmbH U-L-M Photonics (Germany)
Roland Jäger, Philips Technologie GmbH U-L-M Photonics (Germany)

Published in SPIE Proceedings Vol. 7615:
Vertical-Cavity Surface-Emitting Lasers XIV
James K. Guenter; Kent D. Choquette, Editor(s)

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