Selection and use of optical modules
The optical module is composed of optoelectronic devices, functional circuits and optical interfaces, etc. The optoelectronic devices include two parts: transmitting and receiving.
The optical module can convert electrical signals into optical signals at the transmitting end through photoelectric conversion, and then convert the optical signals into electrical signals at the receiving end after being transmitted through optical fibers.
Any optical module has two functions of sending and receiving, performing photoelectric conversion and electro-optical conversion, so that the optical modules are inseparable from the devices at both ends of the network.
Nowadays, there are often tens of thousands of devices in a data center. To realize the interconnection of these devices, optical modules are indispensable. Today, optical modules have become a segment of the data center.
With the wide range of optical modules, more and more customers have begun to pay attention to the stability and reliability of the modules themselves. There are three kinds of popular optical modules on the market now: original optical modules, second-hand optical modules and compatible optical modules.
As we all know, the price of original optical modules is very high, and many users can only stay away. As for second-hand optical modules, although the price is relatively low, the quality is not guaranteed, and packet loss often occurs after a period of use.
Therefore, many manufacturers have turned their attention to compatible optical modules. Indeed, when compatible optical modules are in use, their performance is almost the same as that of original optical modules, and the price is several times cheaper than original optical modules. This is also compatible with optical modules. The reason for the heat.
However, the products on the market are mixed, and many merchants are shoddy and confused, which makes the selection of optical modules difficult. The following will discuss the selection of optical modules in detail. The transceiver modules compatibility matrix provides a comprehensive overview of the compatibility between different transceiver modules, enabling users to ensure seamless integration and optimal performance within their network infrastructure.
We cannot ignore optical transceivers market. First of all, the first question, is how do we distinguish between new optical transceiver modules and second-hand optical modules? Second-hand optical modules often lose packets after a period of use, which is caused by unstable optical power and reduced optical sensitivity.
If we have an optical power meter, we can take it out and test it to see if its optical power is consistent with the parameters on the data sheet. If the discrepancy is too large, it is a second-hand optical module.
Then observe the after-sales use of the optical module. The service life of a normal optical module is 5 years. It is basically difficult to see the quality of the optical module in the first year, but it can be seen in the second or third year of its use.
Secondly, it depends on the qsfp compatibility matrix between the optical module and the device. Before purchasing, consumers need to communicate with the optical module manufacturer to inform which brand of equipment they need to use.
Finally, we also need to see how the temperature adaptability of the optical module is. The temperature generated by the optical module itself during operation is not high.
However, its general working environment is in the computer room or on the switch. Too high or too low temperature will affect its optical power, optical sensitivity and other parameters.
Under normal circumstances, the temperature range of the China optical transceiver used is 0~70°C . If it is in an extremely cold or extremely hot environment, an industrial-grade -40~85°C optical module is required.
If you find that the function of the optical module fails during use, don't worry, check carefully and analyze the specific reasons.
Generally, there are two main types of optical module function failures, namely, the failure of the transmitter and the failure of the receiver. The most common reasons are as follows:
The optical port of the optical module is exposed to the environment, and the optical port is polluted by dust; the end face of the optical fiber connector used is polluted, and the optical port of the optical module is polluted twice; the end face of the optical connector with pigtail is not used properly, and the end face is scratched, etc.; use Poor quality fiber optic connectors.
Therefore, after purchasing an optical module correctly, you should also pay attention to the cleaning and protection of the optical module during use. After normal use, it is recommended to plug the dust plug when not in use. Because if the optical contact is not clean, it may affect the signal quality, which may cause LINK problems and bit error problems.
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.