Along with the rapid development of technology, 100-Gbps transmission has become available in various data communication applications. And many optical components have dominated 100G deployments, such as CFP optical transceivers. The C form-factor pluggable (CFP) is a hot-pluggable transceiver module form factor. It is specified by a multi-source agreement (MSA) between competing manufacturers to produce a common form-factor for the transmission of high-speed digital signals. The following passages will mainly introduce its two followers : CFP2 and CFP4.

Being a new generation of CFP, CFP2 is a hot-pluggable transceiver module that supports the IEEE 100 Gigabit Ethernet. Compared to the existing CFP, CFP2 is half the size of the CFP and consumes half the power. Besides, CFP2 doubles the front panel port density owing to integration of optics and ICs, and increase in electrical I/O rate from 10G to 25G. While talking about CFP2 optics, 100GBASE-LR4 CFP2 is widely used. It enjoys the following features and applications.

• Hot-pluggable CFP2 form factor
• Supports 103.1Gb/s and 112Gb/s aggregate bit rates
• Up to 10km transmission on SMF
• Duplex LC receptacles

• OTU4 4I1-9D1F Client Applications
• 100GBASE-LR4 100G Ethernet
• CFP MSA module form factor

The first CFP4s were expected to appear in 2013, but until 2014 at OFC (Optical Fiber Communication Conference 2014), the CFP4 specifications document became available announced by MSA (Multi-Source-Agreement) members. CFP4 shares similar features with CFP2 except that it has a smaller size than CFP2. In addition, the front panel port density is quadrupled by CFP4. When it comes to CFP4 products, 100GBASE-LR4 CFP4 is primarily deployed because of its outstanding features. It can support 103.1Gb/s aggregate bit rate with the maximum link lengths up to 10km on Single-Mode Fiber (SMF). Also it is appropriate for 4x25G electrical interface. As for its applications, it is suitable for 100GBASE-LR4 Ethernet, proprietary protocol, Ethernet switches and routers. In addition, CFP4 also supports 100GE-SR4 optical modules, such as 100GBASE-SR4 CFP4 850 nm 100 m Optical Transceiver for Multi-Mode fibers (MMF), and 100GBASE-SR4 and OTN Multirate CFP4 850 nm 100 m Optical Transceiver for Multi-Mode fibers (MMF).

As two versions of CFP, CFP2 and CFP4 can realize fiber connectivity with higher density and performances. Besides 100GBASE-LR4 CFP2 and 100GBASE-LR4 CFP4, 100GBASE-LR4 CFP is also available in Fiberstore. You can visit Fiberstore for more information about 100G CFP optical transceivers.

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