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What is a 40G Optical Module? What Are the Characteristics?

When the 10G network has gradually failed to meet the needs of users, the 40G network system has entered people's attention. Since then, the 40G optical module has brought a qualitative leap to the optical fiber transmission speed.

Ⅰ. What is a 40G optical module?

The 40G optical module is a product derived to meet the needs of higher-density high-speed pluggable solutions. It has 4 independent transmit and receive optical signal channels, which can be used for data centers, high-performance computing networks, enterprise core layers and The distribution layer and telecom operators provide high-density and low-power 40G Ethernet connection transmission applications.

Ⅱ. What are the classifications of 40G optical modules?

There are three common types of 40G optical modules: CFP, QSFP and QSFP+ optical modules:

The 40G CFP optical module is specially designed for 40G Ethernet links on single-mode fiber, RoHS-6 compliant, and provides digital diagnostic functions through the MDIO interface specified by CFIO MSA;

The 40G QSFP (Quad Small Form-factor Pluggable) optical module has four independent full-duplex transceiver channels and is a four-channel small form-factor pluggable optical module.

The density of QSFP optical module is 4 times that of XFP optical module and 3 times that of SFP+ optical module. As an optical fiber solution, it meets the needs of high-density and high-speed transmission;

40G QSFP+ optical module is a product developed on the basis of QSFP. It is dedicated to high-density applications. Compared with traditional SFP+ optical modules, the port density is higher and the overall system cost is lower. We also have sfp+ transceiver module.

The 40g qsfp+ optical module conforms to various standards such as SCSI, 40G Ethernet, 20G/40G Infiniband, etc. It has four data transmission channels.

The transmission rate of each channel is about 10Gbps, and the simultaneous transmission of four channels can achieve a transmission rate of 40Gbps. This optical module mainly has two interfaces: LC and MTP/MPO, which are used in single-mode applications and multi-mode applications respectively.

Ⅲ. Application of 40g qsfp+ optical module

As a reliable and responsible optical module manufacturer, we are pleased to share with you that there are multiple types of 40G QSFP+ optical modules, including 40G BASE-SR4, 40G BASE-LR4, 40G BASE-ER4, etc.

The 40G BASE-SR4 optical module adopts MTP/MPO interface, and the working wavelength is 850nm, which is generally used in multi-mode applications. When it is used with OM3/OM4 multimode fiber, the transmission distance is 100m and 150m respectively, and it is mainly used to realize the connection between network devices in the data center.

40G BASE-SR4 optical module can not only use MTP/MPO fiber jumper to realize the connection between two 40G network equipment but also can be used with MTP/MPO to LC fiber jumper to realize the connection between 40G network equipment and 10G network equipment. And more information can be found in fiber optic transceiver wiki.

Ⅳ. What are the characteristics of 40G optical modules?

1. Reasonably and effectively use the transmission frequency band, and the spectral efficiency is relatively high;

2. The cost is effectively reduced, and it is more economical than other MAN solutions;

3. The network structure is simplified and the number of accessories is reduced. It is worth mentioning that in the application of metro backbone network, 40G optical module scheduling and integration are far better than four 10G systems, which can save the area of the equipment room, reduce equipment stacking, and improve the bandwidth management capability and performance of single-node equipment. scheduling capability;

4. Usually, a single wavelength can handle multiple data connections, the function of the core network will be greatly enhanced, and the business can be better expanded.

Compatible Optical Transceiver

Equipment manufacturers of optical modules will encrypt their devices to varying degrees, also known as compatibility. Modules of a particular brand can only be used with devices of the same brand, and cannot be matched with other brand optical modules. Compatibility manufacturers need to conduct different compatibility adaptations on the optical modules. Whether or not they can perfectly solve compatibility issues is particularly important.

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