The composition of an optical module mainly consists of three parts: TOSA components, ROSA components and PCBA boards. (Note: BOSA components can include TOSA components and ROSA components.)
If you want to determine the components of an optical module failure, you can do so through the following methods:
First, the TOSA component and ROSA component can be disassembled, and then tested through a dedicated component test board. (If not available, it can also be tested by installing it in the confirmed optical module.)
When powered on, use a multimeter to measure the voltage at each pin to see if the voltage value is normal. When the power is off, use a multimeter to check whether the circuit led out from the pin is unobstructed.
Once again, based on the adverse situations that have emerged, purposefully inspect the places where the adverse phenomena occur.
For instance, if it is found that the optical power is “low”, the optical power value of the module needs to be tested through an optical power meter: by changing the relevant resistance value, the power can be adjusted. The reading of the large power meter will increase, and at the same time, the BIAS current BIAS value will also increase, and the working current will increase. This change indicates that the PCBA circuit is conducting, and there are no issues with its driving performance and storage performance. From this, it can be initially judged that the TOSA optical power is poor and the PCBA board is good, but it cannot be ruled out that there is a possibility of poor PCBA.
The above is the knowledge explanation on “Structural Issues of Optical Modules” brought by Shenzhen HDV Phoelectronic Technology Co., LTD. The module products produced by this company cover optical fiber modules, Ethernet modules, optical fiber transceiver modules, optical fiber access modules, SSFP optical modules, SFP optical fiber modules, etc. All the above-mentioned modular products can provide support for different network scenarios. For the above-mentioned products, a professional and powerful R&D team has been paired to provide technical support for customers. Moreover, a considerate and professional business team can offer high-quality services for customers’ initial consultation and subsequent work.