CFP2 MSA PDF

By Ferris Lipscomb, Ph. In this post, I would like to give some additional details about the CFP2-ACO pluggable coherent optics transceiver, which is gaining considerable interest for next generation G metro systems. At the same time, designers are pushing for smaller transceivers to increase the bandwidth density making the small size of the CFP2 form factor attractive. These two desires created a problem in that the current technology could not fit all of the necessary elements for a G coherent transceiver within either the physical size or the electrical power budget of a CFP2. The solution to the problem was to define a new type of coherent transceiver, the CFP2-ACO, and to develop newer and smaller optical components.

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By Ferris Lipscomb, Ph. In this post, I would like to give some additional details about the CFP2-ACO pluggable coherent optics transceiver, which is gaining considerable interest for next generation G metro systems.

At the same time, designers are pushing for smaller transceivers to increase the bandwidth density making the small size of the CFP2 form factor attractive. These two desires created a problem in that the current technology could not fit all of the necessary elements for a G coherent transceiver within either the physical size or the electrical power budget of a CFP2.

The solution to the problem was to define a new type of coherent transceiver, the CFP2-ACO, and to develop newer and smaller optical components. The major optical elements required to make a G coherent transceiver are a narrow linewidth tunable laser to serve as a light source, a dual polarization coherent modulator to impress the data on the phase of the optical signal and an integrated coherent receiver ICR , with a narrow linewidth local oscillator laser, to convert the optical phase information back into an electrical voltage signal.

To this must be added the major electronic elements of a high speed digital to analog converter ADC to digitize the received signal and a high speed digital signal processor DSP to reconstruct the transmitted information, removing the impairments imposed by long distance transmission through the fiber. This approach significantly reduces the number of components that have to be put in the CFP2 as well as the electrical power that must be dissipated, but has the significant drawback that a CFP2-ACO must be plugged into a special slot that can only accept CFP2-ACOs, and cannot be plugged into any arbitrary CFP2 slot.

This greatly reduces the flexibility of using the same form factor for client and line side transceivers, but it is the only level of integration that is achievable at present. The CFP2 form factor has nominal dimensions of First generation coherent optical components were simply too large to all fit into the CFP2 envelop.

The receiver itself would take up almost the entire CFP2 envelop, an obvious non-starter. Multiple vendors are currently offering micro-ICRs. Some overlap of the boots with other components is permitted. This component is more challenging to fit in a CFP2 form factor. Virtually all of the hundreds of thousands of coherent systems that have been deployed use Lithium Niobate based modulators, and the OIF duly issued an implementation agreement MSA specifying many of the parameters, including dimensions: There are several different types, but all have a total length, including boots, on the order of mm, and are therefore unsuitable for use in a CFP2-ACO.

Therefore, many companies are exploring other types of coherent modulators which can be much more compact and are based on different materials, particularly Indium Phosphide and Silicon Photonics. Coherent modulators and these two materials were discussed in detail in the post by Dr.

Milind Gokhale last week. Individual vendors are currently implementing the coherent modulator for a CFP2 in their own ways. This approach will be discussed in future posts.

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CFP2-DCO Product Family

Kajir The c stands for the Latin letter C used to express the number centumsince the standard was primarily developed for Gigabit Ethernet systems. On the receive side, four lanes of optical data streams are optically demultiplexed by an integrated optical demultiplexer. The ACO interface can be used in coherent optics applications when the link delivers a flexible amount of bandwidth to the ms, for example when combined with FlexE. Skip to main content.

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