Remote gain unit, attenuation detection method and remote pump transmission system

The invention relates to the technical field of optical communication, in particular to a remote gain unit, an attenuation detection method and a remote pump transmission system.Measurement light and signal light are separately transmitted through corresponding optical path design, so that the measurement light skips an amplification optical fiber for transmission, absorption of the amplification optical fiber to the measurement light is avoided, and the measurement accuracy is improved. The method can be used for directly measuring the span loss of the optical cable in the remote pump transmission system, is also suitable for measuring light with any wavelength, thoroughly solves the problem that the span loss in the remote pump transmission system cannot be directly measured, and provides great help for the operation and maintenance of the remote pump transmission system. 本发明涉及光通信技术领域，特别是涉及一种远程增益单元、衰耗检测方法和遥泵传输系统，本发明通过相应的光路设计将测量光与信号光分离传输，从而实现测量光跳过放大光纤进行传输，避免了放大光纤对测量光的吸收，这不仅可用于遥泵传输系统中光缆跨损的直接测量，而且对任意波长的测量光均可适用