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Proceedings Paper

Scaling VCSEL performance for 100terabits/s systems
Author(s): J. E. Cunningham; D. Beckman; Xuezhe Zheng; A. V. Krishnamoorthy
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Paper Abstract

We evaluate VCSEL interconnects for next-generation High Productivity Computers in which hundreds of terabits of bandwidth are envisioned. We present results for VCSEL based links operating PAM-4 signaling using a commercial 0.13μm CMOS technology. We perform a complete link analysis of the Bit Error Rate, Q factor, random and deterministic jitter by measuring waterfall curves versus margins in time and amplitude. We demonstrate that VCSEL based PAM-4 can match or even improve performance over binary signaling under conditions of bandwidth limited 100meter multi-mode optical link at 5Gbps. We present the first sensitivity measurements for optical PAM-4 and compare it with binary signaling. An empirical relationship for VCSEL scaling versus bit rate and aperture is presented in order to explore reliability of VCSEL-based links. Reliability is found to degrade with aperture with a fourth order power law dependence.

Paper Details

Date Published: 3 March 2006
PDF: 11 pages
Proc. SPIE 6124, Optoelectronic Integrated Circuits VIII, 61240O (3 March 2006); doi: 10.1117/12.658826
Show Author Affiliations
J. E. Cunningham, SUN Microsystems (United States)
D. Beckman, SUN Microsystems (United States)
Xuezhe Zheng, SUN Microsystems (United States)
A. V. Krishnamoorthy, SUN Microsystems (United States)

Published in SPIE Proceedings Vol. 6124:
Optoelectronic Integrated Circuits VIII
Louay A. Eldada; El-Hang Lee, Editor(s)

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