"All-optical communication" is a new type of light wave communication without any photoelectric conversion. In an all-optical communication system, images and voice information are directly converted into optical signals and transmitted in transmission media. In camera optical systems, fiber optic systems and In the all-optical communication system composed of the receiving optical amplification system, since no photoelectric conversion is required, there are no electronic components, the signal distortion is small, and it can continuously work in high temperature environments above 100 㠃, which is an ideal communication method. Which of the following statements does not fit the text is:. ['All-optical communication without information conversion.', 'The information medium of the all-optical communication system is light waves.', 'No electronic components in all-optical communication systems.', 'All-optical communication signal distortion is small because there is no photoelectric conversion.']