WAVELENGTH MULTIPLEX LIGHT SOLITON TRANSMISSION SYSTEM AND TRANSMITTER

摘要

PURPOSE:To amplify a wavelength multiplex soliton pulse train at a time and to send it over a long distance by interposing an erbium optical fiber amplifier which excites by a semiconductor layer with specific oscillation wavelength into a transmission line. CONSTITUTION:A single-mode optical fiber which is formed by doping erbium is excited by laser light with 1.4 - 1.5mum wavelength and plural signal light beams which are inputted to the erbium-doped single-mode optical fiber 11 and has mutually different wavelength of 1.53 - 1.60mum are amplified at the same time. Then the signal light beams are inputted to the single-mode optical fiber 12 for transmission as the wavelength multiplex soliton pulse train and propagated in the single-mode optical fiber 12 for transmission, and the train is regenerated and repeated. Thus, a semiconductor laser which outputs light with optional wavelength in the wavelength range can be obtained. Consequently, optical soliton is wavelength-multiplexed and transmitted over a long distance and the amount of information which can be transmitted can be increased.