A bypass telepump erbium-doped optical fiber transmission method and system based on linear frequency modulation

The invention relates to the field of optical fiber communication, in particular to a bypass remote pumping erbium-doped optical fiber transmission method and system based on linear frequency modulation, wherein the method comprises the following steps: the first linear frequency modulation is carried out on the pump light output by a long-distance pumping unit, so that the pump light spectrum isbroadened and transmitted through the bypass optical fiber; before the pump light reaches the remote gain unit through the multiplexer, the pump light is linearly modulated for the second time so as to compress the spectrum of the pump light. Where the slopes of the two LFMs are opposite. In a bypass remote pump erbium-doped optical fiber transmission method and system based on linear frequency modulation, before the pump light arrives at the remote gain unit, the pump light is linearly modulated twice to broaden and compress the pump light spectrum respectively. By twice modulation, the energy efficiency and gain of