Which system component regulates output levels to avoid laser clipping?

The component that regulates output levels to avoid laser clipping is the Cable Modem Termination System (CMTS). The CMTS is responsible for managing the data sent over coaxial cable systems and helps ensure a stable output signal from the laser to prevent clipping, which occurs when the signal level is too high and results in distortion. This regulation is crucial for maintaining the quality of the signal as it is transmitted over long distances, allowing for effective communication without loss of information.

In contrast, other components such as the headend modulator, isolation amplifier, and optical receiver play different roles in the transmission and processing of signals but do not specifically focus on the regulation of output levels directly associated with the laser's performance and potential clipping. The headend modulator mainly manages the signal modulation process, the isolation amplifier is used to prevent interference and maintain signal integrity, and the optical receiver's role is to convert optical signals back into electrical signals for processing.