- Different phenomena cause signal power loss in a fiber-optic link.
- Fiber-related factors such as attenuation in a single fiber and fiber breaks or faults,can diminish a signal power level to a point below detector sensitivity .
- Connector related factors ,such as a contimnated / dirty end face and connector mismatch or misalignment,can cause high attenuation levels and total communication loss.
- System factors such as insertion loss, return reflection loss, and splice loss , affect transmission.
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