Which component of an optical modulation system contains an optical detector and a demodulator?

The optical receiver is the component of an optical modulation system that contains both an optical detector and a demodulator. The primary function of the optical receiver is to convert incoming optical signals into electrical signals. The optical detector typically uses a photodiode to sense the light signals and convert them to electrical current. Following this, the demodulator extracts the original data from the modulated signal by processing the electrical output from the detector. This dual functionality is essential for ensuring that data transmitted via optical fibers is accurately received and reconstructed.

In contrast, the optical amplifier is designed to boost the strength of optical signals but does not perform detection or demodulation. The optical transmitter, on the other hand, is responsible for encoding and sending information over the fiber using light but does not have the capabilities to receive or process incoming signals. An optical filter is used to selectively transmit certain wavelengths of light while blocking others; it does not include the detection or demodulation components needed to interpret the transmitted data.