Optical module test process
The test process of the optical module must strictly require the following steps, and all parameters must meet the requirements to ensure that the optical module is sold without any quality problems.
The output optical power is an important parameter that determines the transmission distance and quality of the optical module. Too high or too low is not good; the receiving sensitivity can determine the sensitivity of the optical module to receive light. Generally, the higher the optical module rate, the worse the receiving sensitivity;
②Eye diagram, extinction ratio test
The shape of the eye diagram is similar to that of an eye, which is the result of the oscilloscope's multiple acquisition of digital signals and superimposed display, which can reflect whether the measured signal is lost or not and whether the signal transmission is good;
Extinction ratio is one of the parameters used to measure the quality of optical modules. The larger the extinction ratio, the stronger the ability of the optical signal to be received and discriminated, and the higher the receiving sensitivity will be.
Extinction ratio and optical power are inversely proportional. In the test process, it can be found that the larger the extinction ratio, the smaller the emitted light power;
③High and low temperature aging test
The application environment of the optical module is different, and its working temperature is also different. Before leaving the factory, the optical module must be subjected to high and low temperature aging test in the aging box to verify whether the performance index of the optical module meets the standard in the extreme environment;
④ Compatibility connectivity test
Insert the optical module into the switch of the corresponding brand for detection and connectivity test. If it can be connected, it means that the optical module is compatible and the optical module can communicate. If it cannot be connected, further testing is required;
⑤ End face cleaning
In the various testing links of optical modules, it is inevitable that some dirt and scratches will appear. It needs to be observed through a microscope. If there is no problem, it can be packaged and shipped. If there is a problem, it needs to be dealt with.
Toputel Optical Transceiver https://www.toputel.com/product/optical-transceiver for more details.
