QSFP + Performance

- Jul 24, 2017-

QSFP + plug-in interface is one of the more commonly used, there are three types of 40G QSFP + optical modules under this standard, namely 40G LR4 QSFP + optical module, 40G SR4 QSFP + optical module and 40G LR4 parallel single- Mode, PSM) optical module. Today, FS.COM mainly to introduce these three common 40G QSFP + optical module, including what it is, what performance, etc., hoping to buy for everyone to help.

QSFP + optical module is generally connected with the LC connector, QSFP+ can support single-mode fiber maximum transmission distance of up to 10km. This optical module has four independent transmit and receive optical signal channels, the need to use MUX or DEMUX to optical signal reuse and demultiplexing. At the receiving end, four channels with a transmission rate of 10 Gbps are transmitted at the same time. When these serial data streams are passed to the laser driver, the laser driver uses direct modulation lasers (DMLs) to control the wavelength. QSFP+ The optical signals modulated by the direct-modulated laser are then multiplexed together and transmitted over a single-mode fiber. When the receiver reaches the receiver, these transmitted signals are then demultiplexed into four channels with a transmission rate of 10 Gbps. And then PIN detector or transimpedance amplifier for each data stream to restore, and finally Jiang light signal sent out.

The QSFP + optical module is often used with the MPO / MTP connector in 40G data transmission. Unlike the 40G LR4 QSFP + optical module, this optical module is often used for multi-mode fiber transmission, can support OM3 jumper about 100 meters of signal transmission and OM4 jumper 150 meters or so signal transmission. QSFP+ In the transmission side of the transmission signal, the first laser array will be converted into electrical signals optical signals, through the band-like multi-mode fiber parallel to send. QSFP+ When the receiver receives the signal, the photodetector array converts the parallel optical signal into a parallel electrical signal.

40G SR4 The QSFP + optical module is suitable for short-range transmission and is commonly used in data centers to connect Ethernet switches to OM3 / OM4 ribbon cables. While the 40G LR4 QSFP + optical module and the 40G LR4 PSM optical module are suitable for long distance transmission. QSFP+ Compared to these two optical modules, the 40G LR4 QSFP + optical module is more cost-effective. Because the 40G LR4 QSFP + optical module requires only two single-mode fibers in long-distance transmission, the 40G LR4 PSM optical module requires eight single-mode optical fibers. FS.COM provides customers with a range of cost-effective 40G QSFP + solutions with high density, high efficiency and low cost, and can be widely used in data centers, high performance computing networks, enterprise core and distributed layers , QSFP+ One should meet your needs!

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