The temperature of the optical module rises

Why does the temperature of the optical module rise? Is the optical module selected correctly?

According to the working temperature, optical modules can be divided into commercial grade and industrial grade, among which commercial grade optical modules are most widely used. But in fact, different application environments need to choose optical modules with corresponding temperature levels, otherwise it is easy to cause abnormal temperature of optical modules, thus affecting normal use. So how to make the right choice among common commercial grade and industrial grade optical modules?

•Commercial-grade optical modules are suitable for indoor data center computer rooms—because the operating temperature range of optical modules required for internal interconnection in data centers is relatively small (the national policy stipulates that the indoor temperature of the computer room should be controlled at 22±2°C); and it is reliable for optical modules Therefore, the indoor data center computer room can choose commercial-grade optical modules.

•Industrial-grade optical modules are suitable for industrial Ethernet and 5G fronthaul—industrial Ethernet has a large operating temperature range and requires high safety and reliability. In order to ensure the normal operation of optical modules, it is best to choose industrial-grade optical modules. At the same time, in the 5G bearer optical module white paper, it is mentioned that the 5G fronthaul AAU side optical module involves outdoor applications, the outdoor temperature is changeable, and the working environment is relatively harsh, so industrial-grade optical modules with better performance are required.

Industrial-grade optical modules are manufactured in strict accordance with industrial standards, with larger temperature differences, higher stability, and lower power consumption to meet the network connection requirements of industrial Ethernet.

In addition, the selected optical module is not compatible with the equipment is also one of the reasons. Before purchasing an optical module, you did not fully understand the optical module information supported by the device (such as a switch, fiber optic transceiver, etc.), such as speed, model, etc.; or use other brands of optical modules purchased by Huawei switches (such as Cisco, Brocade, etc.).

Whether the heat dissipation conditions of the environment where the optical module is located are qualified

In addition to the reasons for the selection of the optical module mentioned above, the temperature rise of the optical module will also have an impact on the unqualified heat dissipation conditions of the environment where the optical module is located. like,

• The computer room is not equipped with cooling devices such as air conditioners and temperature and humidity controllers—the use of air conditioners and temperature and humidity controllers can effectively control the temperature of the equipment working environment in the computer room, thereby ensuring that the actual application environment temperature of the optical module is controlled within the range.

•The heat dissipation function of the device where the optical module is inserted is poor—for example, the matched switch has no airflow baffle, or the front panel of the switch does not adopt an open design, etc., which will affect the heat dissipation of the switch itself. It will cause the temperature of the device to be too high, thereby affecting the temperature of the optical module.