CW high power 1.24 µm and 1.48 µm Ramanlasers based onlow loss phosphosilicate fibre

The authors propose a new simple configuration for 1.24 and 1.48 µm Raman fibre lasers which are promising pumping sources for 1.31 µm Raman amplifiers and Er-doped fibre amplifiers, respectively. Efficient resonant conversion of CW 1.06 µm radiation to the first (1.24 µm) and second (1.48 µm) Raman Stokes in a phosphosilicate fibre is demonstrated for the first time.