Development of modulation formats in optical fiber communication channel

Анотація

We analyze optical modulation formats allowing to increase information bit rate in telecommunication systems based on DWDM without essential signal distortion because of non-linearity and different types of dispersion. Usage of amplitude modulation prevents increase of spectral efficiency, which will be the only way for future telecommunication networks to increase total rate of transmission. It is perspective to use PSBT format and multilevel formats in DWDM networks. They allow to increase spectral efficiency and stability to different types of dispersion in optical fiber.

Keywords: amplitude shift keying, dense wavelength division multiplexing, digital fiber transmission, phase shift keying, modulation format