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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 31, Iss. 4 — Feb. 15, 2013
  • pp: 672–680

Terabit/Sec VCSEL-Based 48-Channel Optical Module Based on Holey CMOS Transceiver IC

Fuad E. Doany, Benjamin G. Lee, Daniel M. Kuchta, Alexander V. Rylyakov, Christian Baks, Christopher Jahnes, Frank Libsch, and Clint L. Schow

Journal of Lightwave Technology, Vol. 31, Issue 4, pp. 672-680 (2013)


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Abstract

We report here on the design, fabrication and characterization of 48-channel parallel optical transceivers demonstrating terabit/sec data transfer rate. The 0.48 Tb/s transmit plus 0.48 Tb/s receive throughput was achieved using a second-generation single-chip holey CMOS transceiver IC. In addition to 24 receiver (RX) and 24 laser diode driver circuits, the 5.2 mm × 5.8 mm single CMOS chip incorporates 48 through-substrate optical vias (holes), one for each transmitter (TX) and RX channel. A complete holey Optochip is formed following direct flip-chip attachment of 24-channel 850-nm VCSEL and PD arrays. The 48 optical vias enable optical access to the 24 VCSELs and 24 PDs. The holey Optochip concept provides a dense chip-scale package which is fully compatible with industry-standard top emitting/detecting 850-nm VCSELs/PDs providing optimized high-speed performance through close integration of the optoelectronic (OE) devices with their drive electronics. Furthermore, the optical vias and OE devices are arranged in a 4 × 12 array on 250 µm × 250 µm pitch to facilitate direct fiber-coupling to a standard 4 × 12 multi-mode fiber array.The Optochips are packaged into complete modules by flip-chip soldering to high-density, high-speed organic carriers. A pluggable connector soldered to the bottom of the carrier provides all module electrical I/O. The 18 mm × 18 mm overall module area is dictated by the 0.8 mm-pitch ball grid array (BGA) of the organic carrier and connector. Fully functional holey Optomodules with 24 TX and 24 RX channels operate up to 20 Gb/s/ch achieving efficiencies (including both TX and RX) of 7.3 pJ/bit. The terabit/sec data rate (480 Gb/s TX + 480 Gb/s RX) is highest reported for single-chip CMOS transceiver modules.

© 2012 IEEE

Citation
Fuad E. Doany, Benjamin G. Lee, Daniel M. Kuchta, Alexander V. Rylyakov, Christian Baks, Christopher Jahnes, Frank Libsch, and Clint L. Schow, "Terabit/Sec VCSEL-Based 48-Channel Optical Module Based on Holey CMOS Transceiver IC," J. Lightwave Technol. 31, 672-680 (2013)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-31-4-672

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