3 June 2002 CWDM for very-short-reach and optical-backplane interconnections
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Proceedings Volume 4652, Optoelectronic Interconnects, Integrated Circuits, and Packaging; (2002); doi: 10.1117/12.469575
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States
Abstract
Course Wavelength Division Multiplexing (CWDM) provides access to next generation optical interconnect data rates by utilizing conventional electro-optical components that are widely available in the market today. This is achieved through the use of CWDM multiplexers and demultiplexers that integrate commodity type active components, lasers and photodiodes, into small optical subassemblies. In contrast to dense wavelength division multiplexing (DWDM), in which multiple serial data streams are combined to create aggregate data pipes perhaps 100s of gigabits wide, CWDM uses multiple laser sources contained in one module to create a serial equivalent data stream. For example, four 2.5 Gb/s lasers are multiplexed to create a 10 Gb/s data pipe. The advantages of CWDM over traditional serial optical interconnects include lower module power consumption, smaller packaging, and a superior electrical interface. This discussion will detail the concept of CWDM and design parameters that are considered when productizing a CWDM module into an industry standard optical interconnect. Additionally, a scalable parallel CWDM hybrid architecture will be described that allows the transport of large amounts of data from rack to rack in an economical fashion. This particular solution is targeted at solving optical backplane bottleneck problems predicted for the next generation terabit and petabit routers.
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Michael J. Laha, "CWDM for very-short-reach and optical-backplane interconnections", Proc. SPIE 4652, Optoelectronic Interconnects, Integrated Circuits, and Packaging, (3 June 2002); doi: 10.1117/12.469575; https://doi.org/10.1117/12.469575
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KEYWORDS
Coarse wavelength division multiplexing

Switches

Dense wavelength division multiplexing

Interfaces

Optical interconnects

Vertical cavity surface emitting lasers

Active optics

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