Ultra-detailed introduction of 40G QSFP+ SR4 optical module

40G optical module refers to an optical module with a transmission rate of 40Gbps, which has four independent transmitting and receiving optical signal channels, and its packaging forms are mostly CFP and QSFP+. 40G QSFP+ optical module is a product developed on the basis of QSFP, which meets the needs of higher-density high-speed pluggable solutions. This article will introduce the 40G QSFP+ SR4 optical module in detail.

The 40G QSFP+ SR4 optical module adopts a 4-channel 850nm VCSEL array and a PIN photodetector array, and makes eight fibers into four duplex channels, each channel can support 10Gbps data transmission, and can reach 100m link by using OM3 multimode fiber It can be used with OM4 multi-mode fiber up to 150m link length, which is mainly used to realize the connection between network devices in the data center. The connection between two 40G network devices is realized through the MPO fiber jumper, and the connection between the 40G network device and the 10G network device is realized through the MPO-LC fiber branch jumper.

Working principle: When the 40G QSFP+ SR4 optical module transmits signals at the transmitting end, the electrical signals are first converted into optical signals by the laser array. When transmitting signals at the transmitting end and receiving signals at the receiving end, the photodetector array converts the parallel optical signals into optical signals. Parallel electrical signals.

Transmission principle: The 40G QSFP+ SR4 optical module is transmitted through four channels. The electrical signal is first converted into an optical signal by the laser array, and then the parallel optical signal is converted into a parallel electrical signal by the photodetector array, and then passed together with the MTP/MPO connector. Use to achieve 40G optical connection.

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40G QSFP+ SR4 optical module is undoubtedly an ideal solution for short-distance interconnection of 40G network, and at the same time, 40G QSFP+ AOC optical cable also has similar functions. In contrast, 40G QSFP+ AOC will be more stable and reliable than 40G QSFP+ SR4 optical modules, and at the same time, it is easy to install and maintain, and the interconnection cost will be lower. You can choose the most suitable solution according to your needs.