Serial port signals can be transmitted through optical fibers, but some conversion equipment is required to achieve this. Optical fiber transmission has the advantages of long transmission distance and strong anti-interference capability, so using optical fibers to transmit serial port signals is a good choice in some situations where long-distance transmission or severe electromagnetic interference is required.

To transmit serial port signals over optical fiber, a serial port to optical fiber converter is required. This converter converts the serial port signals into optical signals, which are then transmitted over optical fiber. At the receiving end, another serial port to optical fiber converter is used to restore the optical signals into serial port signals, thus enabling remote transmission of serial port signals.