Output characteristics of P-doped Raman fiber laser at 1484 nm with 2.11W maximum output power pumped by CW 1064 nm Yb-doped double-clad fiber laser

The output dependence on output reflectivity and fiber length is reported for a phosphosilicate Raman fiber laser (RFL) at the second Stokes wavelength of 1484 nm using a pump of CW 8.4 W/1063 nm Yb-doped double-clad fiber laser (DCFL) and cascaded cavities for the first and second Stokes wavelength. The output reflectivities for the second Stokes light were 15 and 50% and the lengths of the P-doped Raman fiber (PDF) were 300; 700, and 1000 m. The maximum output of 2.11 W/1484 nm was obtained using 15% output reflectivity and 700 m PDF length and the corresponding slope efficiency from the pump was 33.2%. The laser performance for the six configurations was investigated by observing the maximum output power, slope efficiency, threshold pump power, and full-width at half maximum at the second Stokes wavelength.