RAMAN FIBER LASER

摘要

A Raman fiber laser comprises a laser as a pumping source whose light illuminates a fiber waveguide length having an oxide matrix which includes phosphorus oxide. The apparatus further comprises two pairs of fiber Bragg gratings which form distributed mirrors for a first and a second Stokes components resulting from the presence of phosphorus oxide, and long-period gratings for extracting light of first Stokes components resulting from the presence of silicon oxide and/or germanium oxide and generated by light of the pump laser and the first Stokes component resulting from the presence of phosphorus oxide. The long-period gratings provide an additional optical loss in the Stokes components to prevent resonance conversion of the pump light and the light of the first Stokes component resulting from the presence of phosphorus oxide into these Stokes components, thereby improving the efficiency of resonance conversion of the pump light into the second Stokes component resulting from the presence of phosphorus oxide.