What functions does the detector in an optical receiver perform?

In an optical receiver, the primary function of the detector is to convert the incoming optical signals into electrical signals. This conversion is crucial because, after transmission over optical fibers, the data is in the form of light pulses, which need to be translated back into an electrical format for processing and further transmission in electronic circuits.

The detector typically uses a photodetector, such as a photodiode, which responds to specific wavelengths of light by generating a corresponding electrical current. This process of conversion is key to ensuring that the information encoded in the optical signal can be accurately interpreted by the receiver's electronic components.

While other aspects may be relevant to the functioning of an optical receiver, the primary role of the detector is indeed focused on this conversion from optical to electrical signals. This function distinguishes the role of the detector from amplification, which is typically performed by other components in the receiver system, or the initial signal that may not be directly associated with the detector's primary operational function.