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Proceedings Paper

High-speed highly temperature stable 980 nm VCSELs operating at 25 Gb/s at up to 85 °C for short reach optical interconnects
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Paper Abstract

The progressive penetration of optical communication links into traditional copper interconnect markets greatly expands the applications of vertical cavity surface emitting lasers (VCSELs) for the next-generation of board-to-board, moduleto- module, chip-to-chip, and on-chip optical interconnects. Stability of the VCSEL parameters at high temperatures is indispensable for such applications, since these lasers typically reside directly on or near integrated circuit chips. Here we present 980 nm oxide-confined VCSELs operating error-free at bit rates up to 25 Gbit/s at temperatures as high as 85 °C without adjustment of the drive current and peak-to-peak modulation voltage. The driver design is therefore simplified and the power consumption of the driver electronics is lowered, reducing the production and operational costs. Small and large signal modulation experiments at various temperatures from 20 up to 85 °C for lasers with different oxide aperture diameters are presented in order to analyze the physical processes controlling the performance of the VCSELs. Temperature insensitive maximum -3 dB bandwidths of around 13-15 GHz for VCSELs with aperture diameters of 10 μm and corresponding parasitic cut-off frequencies exceeding 22 GHz are observed. Presented results demonstrate the suitability of our VCSELs for practical high speed and high temperature stable short-reach optical links.

Paper Details

Date Published: 7 February 2011
PDF: 11 pages
Proc. SPIE 7952, Vertical-Cavity Surface-Emitting Lasers XV, 79520H (7 February 2011); doi: 10.1117/12.876156
Show Author Affiliations
Alex Mutig, Technische Univ. Berlin (Germany)
James A. Lott, VI Systems GmbH (Germany)
Sergey A Blokhin, Technische Univ. Berlin (Germany)
Saint Petersburg Physical-Technological Ctr. for Research and Education (Russian Federation)
Philip Moser, Technische Univ. Berlin (Germany)
Philip Wolf, Technische Univ. Berlin (Germany)
Werner Hofmann, Technische Univ. Berlin (Germany)
Alexey M. Nadtochiy, Technische Univ. Berlin (Germany)
Saint Petersburg Physical-Technological Ctr. for Research and Education (Russian Federation)
Dieter Bimberg, Technische Univ. Berlin (Germany)


Published in SPIE Proceedings Vol. 7952:
Vertical-Cavity Surface-Emitting Lasers XV
James K. Guenter; Chun Lei, Editor(s)

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