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40G and 100G Interfaces
Light Reading has has two good articles on 40G and 100G interfaces for those interested in speeds beyond 10G (10G is state of the art for feeding broadband access gear). This first article covers 40G and 100G components, which are used to build the systems. The second article covers 40G and 100G systems. 40G interfaces are used today in occasional backbone applications where the high costs of this technology can be justified.
Though state of the art in broadband access gear uplinks is 10G, eventually 40G (and 100G) interfaces will be used in high bandwidth broadband applications.
A Finisar 40 Gbps transponder is shown in the picture below. Note that this module is almost certainly hand assembled and tested (and expensive) because the volume for these interfaces is just so low today.
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Light Reading has an article today about 100G interfaces on routers and Cisco’s new 16-port 10G line card for its edge routers.
http://www.lightreading.com/document.asp?doc_id=180834