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40G Ethernet comes to be more dominated in the modern network with its high transmission rate. 40G QSFP+ optical module is an important component of 40G Ethernet, which provide high density 40G Ethernet interface for the data centers of the network service providers. Now a verity of 40G QSFP+ optical modules have been appeared on the market, such as 40G Bidi QSFP+ optical modules, 40G QSFP+ for short-distance transmission and 40G QSFP+ for long-distance transmission etc. Here we will describe three kinds of 40G QSFP+ Transceivers for long-distance transmission in detail.
QSFP-40G-ER4 QSFP+ Optical Module
QSFP-40G-ER4 QSFP+ is a hot-pluggable optical module that the data transmission rate up to 44.6Gbps on G.652 single mode fiber and the transmission distance can reach 40km. this optical module has four independent transmission and reception optical signal channels, need to use MUX and DEMUX to multiplex and demultiplex optical signal.
QSFP-40G-ER4 QSFP+ optical module are usually used with LC single mode fiber jumpers to realize the direct connection between devices. As shown below:
QSFP-40G-LR4 QSFP+ Optical Module
40GBASE-PLRL4 QSFP+ Optical Module
In many cases, optical modules are usually need to be interconnected. If you want to change the above connections to interconnection applications, you need to increase the MPO / MTP backbone fiber jumper and fiber distribution box. It should be noted that the optical fiber distribution box should be loaded MPO / MTP adapter panel, as shown below: