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Proceedings Paper

VCSEL-based optical transceiver module for high-speed short-reach interconnect
Author(s): Takatoshi Yagisawa; Hideki Oku; Tatsuhiro Mori; Rie Tsudome; Kazuhiro Tanaka; Osamu Daikuhara; Takeshi Komiyama; Satoshi Ide
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Paper Abstract

Interconnects have been more important in high-performance computing systems and high-end servers beside its improvements in computing capability. Recently, active optical cables (AOCs) have started being used for this purpose instead of conventionally used copper cables. The AOC enables to extend the transmission distance of the high-speed signals dramatically by its broadband characteristics, however, it tend to increase the cost. In this paper, we report our developed quad small form-factor pluggable (QSFP) AOC utilizing cost-effective optical-module technologies. These are a unique structure using generally used flexible printed circuit (FPC) in combination with an optical waveguide that enables low-cost high-precision assembly with passive alignment, a lens-integrated ferrule that improves productivity by eliminating a polishing process for physical contact of standard PMT connector for the optical waveguide, and an overdrive technology that enables 100 Gb/s (25 Gb/s × 4-channel) operation with low-cost 14 Gb/s vertical-cavity surfaceemitting laser (VCSEL) array. The QSFP AOC demonstrated clear eye opening and error-free operation at 100 Gb/s with high yield rate even though the 14 Gb/s VCSEL was used thanks to the low-coupling loss resulting from the highprecision alignment of optical devices and the over-drive technology.

Paper Details

Date Published: 20 February 2017
PDF: 8 pages
Proc. SPIE 10109, Optical Interconnects XVII, 101090E (20 February 2017); doi: 10.1117/12.2251852
Show Author Affiliations
Takatoshi Yagisawa, Fujitsu Component Ltd. (Japan)
Hideki Oku, Fujitsu Component Ltd. (Japan)
Tatsuhiro Mori, Fujitsu Component Ltd. (Japan)
Rie Tsudome, Fujitsu Component Ltd. (Japan)
Kazuhiro Tanaka, Fujitsu Component Ltd. (Japan)
Osamu Daikuhara, Fujitsu Component Ltd. (Japan)
Takeshi Komiyama, Fujitsu Component Ltd. (Japan)
Satoshi Ide, Fujitsu Component Ltd. (Japan)

Published in SPIE Proceedings Vol. 10109:
Optical Interconnects XVII
Henning Schröder; Ray T. Chen, Editor(s)

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