structure and performance of two types of optical amplifier
i.e.
travelling-wave semiconductor laser amplifier and Erbium-doped fiber amplifier
the application and problem of optical amplifier in optical fiber transmission system are also given. In addition
this paper analyses the signal-to-noise ratio for AM and FM format in TV transmission on optical fiber. Finally
the author pointed out that the trend in ultra-long distance fiber transmission is to employ optical fiber amplifier regenerator and wavelength - division multiple -xing.