Brian E. Lemoff

Demonstration of a compact low-power 250-Gb/s parallel-WDM optical interconnect

In this letter, we demonstrate error-free operation of a 12-fiber /spl times/4-wavelength /spl times/5.21-Gb/s parallel-wavelength-division-multiplexed (PWDM) optical link. The 250-Gb/s transmitter and receiver assemblies each have a 5/spl times/8-mm footprint and consume a combined power of 1.5 W. To our knowledge, this is the first publication of a fully functional PWDM optical interconnect as well as the highest demonstrated bandwidth per unit area and bandwidth per unit power consumption for any multiple-channel fiber-optic interconnect. This technology is intended for short-distance high-bandwidth-density applications such as multiprocessor computer backplanes.

500-Gbps Parallel-WDM Optical Interconnect

This paper describes a 500-Gbps parallel wavelength-division multiplexed (PWDM) optical interconnect where 48 channels of 10.42-Gbps data are transmitted over a parallel 12-fiber ribbon with 4 wavelengths per fiber. The transmitter and receiver are each chip-scale packages with a footprint of 5 mm times 8 mm and a combined power consumption of 3 W. This work is motivated by the continually increasing bandwidth needs of short-distance computer processor interconnects, which are demanding optical solutions that maximize bandwidth per unit area, power consumption, and cost

Parallel-WDM for multi-Tb/s optical interconnects

This article presents a promising approach for multi-Tb/s optical interconnects. This approach is contained in the MAUI project, which develops a parallel multiwavelength optical subassembly (PMOSA) that uses PWDM to gain the component-density advantages of two-dimensional parallel optics and the connector and cabling density advantages of CWDM. In the MAUI approach, a standard multimode 12-fiber ribbon is used with 4 wavelengths transmitted through each fiber, for a total of 48 optical channels.

Demonstration of a high-density parallel-WDM optical interconnect

This work presents the first fully-functional 48-channel parallel-wavelength-division-multiplexed (PWDM) transmitter, receiver and link results at a per-channel data rate of 5.21-Gb/s. This high-density PWDM optical interconnect gives an aggregate link bandwidth of a quarter terabit per second.

Ultra-compact, 0.5-Tb/s parallel-WDM optical interconnect

We discuss a 12-fiber /spl times/ 4-wavelength /spl times/ 10.4-Gbit/s short-distance parallel-wavelength-division-multiplexed optical interconnect. The 0.5-Tbit/s transmitter and receiver assemblies each have a 5 /spl times/ 8-mm footprint and together consume 2.95 W.

Compact low cost WDM modules for the LAN

Summary form only given.The ever-increasing need for computer bandwidth is creating bottlenecks in the backbones of local area networks (LANs). To address this the IEEE 802.3 Ethernet working group is developing a standard for 10-Gigabit Ethernet (10-GbE). This standard aims to support LAN links up to 300-m in length using 62.5-/spl mu/m core multimode fiber and up to 10-km in length using single-requirement mode fiber. One optical solution, likely to be included in the standard, is wide wavelength division multiplexing (WWDM). Using a single-mode-coupled transmitter and a multi-mode-coupled receiver allows a single module to simultaneously support both fiber types.

Low-cost WDM transceivers for the LAN

The HP Labs SpectraLAN/sup TM/ project has pursued two very different approaches to making low-cost WDM LAN transceivers. In the first approach, four VCSELs, at wavelengths of 820, 835, 850, and 865 nm, were used. The four optical signals were combined into a 62.5-/spl mu/m multimode fiber, using a 4-to-1 multimode polymer waveguide combiner. On the receiver side, a multimode polymer waveguide demultiplexer was used to separate the wavelengths, which were then directly coupled to a monolithic GaAs pin photodiode array. Multichannel laser driver and receiver ICs were used, fabricated in silicon bipolar electronics. A second design, using a zigzag waveguide pattern was also successfully demonstrated. In this design, light is incident on a dielectric filter at an angle, with one wavelength being transmitted, and the remaining wavelengths reflected into the next arm of the zigzag.Low-cost WDM transceivers are needed for LAN. InGaAs PIN photodiodes detect the light. A multichannel integrated receiver IC amplifies and quantizes the received signal. The transmitter optical subassembly consists of 4 DFB lasers and a silicon V-groove chip robotically aligned to a planar waveguide combiner.