1480 nm two-cascaded highly efficient Raman fiber laser

Summary form only given. Lasers based on high P/sub 2/O/sub 5/-doped fibers can potentially have a higher efficiency than Raman fiber lasers (RFL) based on standard Ge-doped fibers. An increase of phosphorus content in the fiber core gives rise to an increase of the Raman gain coefficient. Despite a rise of optical losses, heavily P/sub 2/O/sub 5/-doped fibers enable one to develop extremely efficient Raman lasers. A two-cascaded Raman laser based on a P/sub 2/O/sub 5/-doped fiber with the frequency shift of 1330 cm/sup -1/ per cascade and with Bragg gratings written directly in the P/sub 2/O/sub 5/-doped fiber demonstrated the highest ever achieved efficiency in RFL.

[1]  Robert J. Mears,et al.  Impact of MPI and modulation format on transmission systems employing distributed Raman amplification , 2001 .

[2]  Namkyoo Park,et al.  Efficient formulation of Raman amplifier propagation equations with average power analysis , 2000 .

[3]  Evgenii M Dianov,et al.  A simple analytic model of a cw multicascade fibre Raman laser , 2000 .

[4]  H.G. Limberger,et al.  CW highly efficient 1.24 /spl mu/m Raman laser based on low-loss phosphosilicate fiber , 1999, OFC/IOOC . Technical Digest. Optical Fiber Communication Conference, 1999, and the International Conference on Integrated Optics and Optical Fiber Communication.

[5]  E. B. Kryukova,et al.  Relation between UV-induced refractive index and absorption in phosphosilicate optical fibers , 2001 .

[6]  W. A. Reed,et al.  High-Power 1.48 µm Cascaded Raman Laser in Germanosilicate Fibers , 1995 .

[7]  Morten Nissov,et al.  Rayleigh crosstalk in long cascades of distributed unsaturated Raman amplifiers , 1999 .

[8]  Eugeni M. Dianov,et al.  Phosphosilicate-core single-mode fibers intended for use as active medium of Raman lasers and amplifiers , 2001, SPIE Optics East.

[9]  M. V. Grekov,et al.  Three-cascaded 1407-nm Raman laser based on phosphorus-doped silica fiber. , 2000, Optics letters.

[10]  R.-J. Essiambre.  Effects of Raman noise and double Rayleigh backscattering on bidirectionally Raman-pumped systems at constant fibre nonlinearity , 2001, Proceedings 27th European Conference on Optical Communication (Cat. No.01TH8551).

[11]  C. Fludger,et al.  Pump to signal RIN transfer in Raman fibre amplifiers , 2001 .