Do you know 100G QSFP28 transceivers types?

The QSFP28 transceiver belongs to a mainstream 100G optical module currently on the market. The QSFP28 optical module provides four channels of different signals, and the transmission rate is increased from 25 Gbps to 40 Gbps. The QSFP28 optical module is smaller than other 100G modules, so it is receiving more and more attention. The 100G QSFP28 optical module has been derived from several categories, each with different optical module standards and suitable for different transmission applications. This article will teach you to identify these conventional 100G QSFP28 transceiver.

100G QSFP28 SR4 Optical Module

Since most of the data centers use multimode fiber, IEEE has developed a standard for 100G QSFP28 optical modules that supports multimode fiber short-distance transmission applications: 100GBASE-SR4. 100G QSFP28 SR4 optical module uses MTP interface (8-core) ), the transmission distance, when used with OM3 multimode fiber, is 70m, and the transmission distance, when used with OM4 multimode fiber, the transmission distance is 100m.

100G QSFP28 LR4 optical module

For 100G long-distance transmission, IEEE also developed the 100GBASE-LR4 standard for 100G QSFP28 optical modules. The 100G QSFP28 LR4 optical module also uses four fiber channels. The difference is that it introduces WDM technology, which can multiplex the different wavelengths of four fiber channels onto one fiber for transmission. Therefore, the 100G QSFP28 LR4 optical module uses The duplex LC interface can be used up to 10km when used with single mode fiber.

100G QSFP28 PSM4 optical module

The 100G-PSM4 is a multi-source protocol (MSA) developed primarily for 100G QSFP28 optical modules. The 100G QSFP28 PSM4 optical module is mainly used for medium and long-distance transmission applications. It uses an MTP interface (8-core) and can transmit up to 500m when used with single-mode multi-core fiber.

100G QSFP28 CWDM4 optical module

100G-CWDM4 is also a multi-source protocol (MSA). The 100G QSFP28 CWDM4 optical module also introduces WDM technology. It adopts the duplex LC interface. When used together with single-mode fiber, the transmission distance can reach 2km, and its transmission distance is 100G. The QSFP28 CWDM4 optical module is short and the price is much cheaper.

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