How to Judge the Optical Module Quality

There are so many factories providing optical modules at big difference price for the same module, so how to judge the quality?

1. The optical transceiver module must comply with the MSA multi-source agreement with CE, ROHS, FCC certification, etc. The multi-source agreement (MSA) standard specifies the interface and size of the module, and according to this agreement the module manufacturer can provide the same function as the switch brand and make sure the optical module is compatible with a variety of original equipment.
2, the optical module should have DOM/DDM function, so that users can monitor the optical module real-time parameters which include working temperature, working voltage, working current, transmit and receive optical power, etc. In addition, it can also display the module factory information and prompt alarms/warnings.
3, the optical module needs to be tested for compatibility with the real machine before leaving the factory to ensure that the optical module has good quality, performance, and compatibility to avoid network interruption, and save maintenance time and cost. It is recommended to check brand compatibility with the supplier before purchasing the optical module.
4. Check whether there are any traces of damage on the surface of the module, whether the golden fingers are scratched, etc. If there is obvious damage, it means that the optical module may be defective or second-hand.
5. It can be judged by after-sales service. Generally, the service life of optical modules is about 3 years. Therefore, when choosing optical modules consider the ones with 3year warranty
6. Use an optical power detector to test whether its optical power is consistent with the parameters in the data sheet. If the discrepancy is too large then consider as second-hand module