Narrow-band, Low-noise Raman Fiber Laser with A Random Fiber Laser Pump

摘要

The present invention discloses a narrow-band, low-noise Raman fiber laser with a random fiber laser pump, pertaining to the technical field of fiber lasers and comprising an ytterbium-doped random fiber laser for producing ytterbium-doped random fiber lasing as the pump of a cascaded Raman random laser; the ytterbium-doped random fiber laser consists of a pump light source, a pump combiner, an ytterbium-doped fiber and a single-mode fiber connected in sequence, as well as a first narrow-band reflector connected to the signal end of the pump combiner. Ytterbium-doped random fiber lasing as the pump of the pump light source disclosed in the present invention is produced by an ytterbium-doped random fiber laser consisting of a narrow-band point reflector, an ytterbium-doped fiber, and a single-mode fiber and further serves as the pump of a Raman light source to achieve random laser output. The Raman fiber laser with a random fiber laser pump provided by the present invention is significantly better in time-domain stability and relative intensity noise than conventional Raman fiber lasers owing to the application of ytterbium-doped random fiber lasing with modeless spectrum as the pump.