OPTICAL RECEIVER SENSITIVITY SYSTEM

摘要

A system includes a detector array having a plurality of level detectors to monitor an optical input signal. Each level detector of the detector array operates in a different operating range, and each operating range for each level detector has a different saturation level and a different cutoff level based on a power level of the optical input signal. A controller monitors the plurality of level detectors of the detector array to detect a present power level for the optical input signal by selecting the operating range that is associated with the level detector operating between its saturation level and its cutoff level.

主权项

1. A system comprising:
a monitor array having a plurality of level detectors to monitor an optical input signal, wherein each level detector of the monitor array employs a different integration time to sense differing power levels in the optical input signal; a controller to monitor the plurality of level detectors of the monitor array to detect a present power level of the optical input signal and to control an output signal attenuation level to a receiver photodetector based on the detected present power level of the optical input signal; and at least one variable optical attenuator (VOA) to adjust the output signal attenuation level to the receiver photodetector in response to the controller.