Detailed introduction of 100G QSFP28 optical module

In the application market of 100G products, it is developing towards low power consumption and small package. At present, 100G base-LR4 and out-4 optical transceiver modules are supported in the market. There are mainly 4x25G EML and 4x25G DML integrated devices. 4x25G DML integrated devices have the advantages of low power consumption and low cost. The optical module meeting the dual rate requirements of 4x25G DML integrated devices is the future development direction

Detailed introduction of 100G QSFP28 optical module 1.100Gbase-SR4 QSFP28 optical module

The 100Gbase-SR4 QSFP28 optical module is a parallel 100G optical module. QSFP28 full duplex optical module provides four independent transmit and receive channels. Each function can operate at 25Gbps at 100m of OM4 MMF, and the overall data rate is 100Gbps.

When the 100Gbase-SR4 QSFP28 optical module transmits the signal at the transmitting end, the electrical signal is converted into the optical signal by the laser array, and then transmitted in parallel on the banded multimode fiber. When it reaches the receiving end, the photodetector array converts the parallel optical signal into the parallel electrical signal.

2.100Gbase-LR4 QSFP28 optical module

100Gbase-LR4 QSFP28 optical module is generally used with LC single-mode fiber jumper, and the maximum transmission distance can reach 10km. The 100Gbase-LR4 QSFP28 optical module converts four 25Gbps electrical signals into four LAN WDM optical signals, and then multiplexes them into a single channel to realize 100G optical transmission. At the receiving end, the module demultiplexer the 100G optical input into four LAN WDM optical signals, and then converts them into four electrical signal output channels.
3.100Gbase-CWDM4 QSFP28 optical module

The transmission rate of QSFP28 CWDM4 optical module is 103.1gbp, which is mainly used in computing, high frequency trading and other fields. Its cost is significantly higher than QSFP28 PSM4 optical module.

Through CWDM Technology, QSFP28 CWDM4 optical module multiplexes 1270nm, 1290nm, 1310nm and 1330nm wavelengths into a single-mode fiber for transmission.

4.100Gbase-PSM4 QSFP28 optical module

QSFP28 PSM4 optical module is a product with high speed and low power consumption, which is specially used for optical interconnection in data communication applications. It conforms to PSM4 MSA optical interface specification, has a hot pluggable QSFP shape, built-in digital diagnosis function, and has four independent full duplex channels, each of which can reach 25.78gbps data rate.

QSFP28 PSM4 optical module is mainly used in 40G and 100G Ethernet. The high bandwidth module supports 100Gbe optical link through single-mode fiber.

With the deepening of cloud computing, big data and other high-speed applications, the popularity of 100G network is more and more rapid, and the demand for 100G optical modules is also increasing. 100G QSFP28 dual rate optical module, including 100G-LR4-QSFP28 and 100G-ER4-QSFP28 optical module.

What is a 100G QSFP28 dual rate optical module?

Dual rate optical module means that the optical module can support two different rates.

100G QSFP28 dual rate optical module can support 103gbps (25G per channel) and 112gbps (28G per channel). This type of optical module conforms to QSFP28 MSA, IEEE 802.3ba standards, 100G-LR4 / ER4 OTU4 The requirement of 4l1-9d1f is a kind of hot pluggable optical module with duplex LC connector, which is suitable for long-distance and high-performance data communication environment, such as switch and router interconnection, data center link aggregation, and more stringent telecommunication application environment.

These two types of 100G QSFP28 dual rate optical modules have different transmission distances. 100G-LR4-QSFP28 dual rate optical module is suitable for 10km, 20km and 25km communication, and 100G-ER4-QSFP28 dual rate optical module is suitable for further distance, such as 30km and 40km.

It is worth noting that the rates of 103.1Gbps and 112gbps of the dual rate optical module are factory settings, which cannot be modified later.

What is the working principle of 100G QSFP28 dual rate optical module?

The 100G QSFP28 dual rate optical module adopts a four channel small pluggable package, which converts four 25Gbps electrical signals into four LAN WDM optical signals, and then multiplexes them into a single channel to realize 100G optical transmission. At the receiving end, the module demultiplexer the 100G optical signal into four LAN WDM optical signals, and then converts them into four electrical signal output channels.

What environment is 100G QSFP28 dual rate optical module applied in?

The 100G QSFP28 dual rate optical module is designed for 100G Ethernet and OTN applications. It has LC interface and can connect LC duplex single-mode fiber. 100G-LR4-QSFP28 dual rate optical module can be used for 100Gbase-LR4 Ethernet and OTN network; 100G-ER4-QSFP28 dual rate optical module can be used for 100Gabase-ER4 Ethernet, server interconnection (QDR and DDR) and client 100G telecom connection.

Different from 1G / 10G SFP + dual rate optical module, 1G / 10G SFP + dual rate optical module can be used for both 1G and 10G, while 100G SFP + dual rate optical module can be used for both 1G and 10G QSFP28 dual rate optical module can’t be used interchangeably after being set up in the early stage. That is to say, if it is set to 103gbps, it is mainly used in Ethernet environment. If it is set to 112gbps, it is mainly used in SDH equipment, and the optical module used in SDH equipment cannot be used in Ethernet equipment.

Note: this optical module is packaged with ESD protection, and it should be used in ESD protection environment after being taken out of the package.

The 100G-LR4QSFP28 / 100G-ER4QSFP28 dual rate optical module has the same complete compatibility as the conventional 100G QSFP28 optical module, and has passed the strict performance test.

HTF's optical module products quality is guaranteed, and the accessories are imported.

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