Abstract

A 3rd-order cascaded Raman fiber laser has been demonstrated without using fiber Bragg gratings at all in the entire laser system. More than 2 W output power at the 3rd Stokes emission wavelength of 1307 nm, a bandwidth of 4.2 nm and a slope efficiency of ~46% was measured when a 500 m long moderately Ge-doped silica fiber was pumped by a free running broadband Yb3+-doped fiber laser. This method is simple, versatile and cheap when compared with conventional methods employing narrow band pumping and fiber Bragg gratings to resonate the Stokes wavelengths. A slope efficiency of ~72% and an output power of over 4 W was also achieved at the 1st order Stokes wavelength of 1168 nm when a 130 m long Ge-doped silica fiber was used.

© 2005 Optical Society of America

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References

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Appl. Phys. Lett.

F. L. Galeener, J. C. Mikkelsen, Jr., R. H. Geils, W. J. Mosby, �??The relative Raman cross sections of vitreous SiO2, GeO2, B2O3, and P2O5,�?? Appl. Phys. Lett. 32, 34-36 (1978).
[CrossRef]

Electron. Lett.

S. K. Sim, H. C. Lim, L. W. Lee, L. C. Chia, R. F. Wu, I. Cristiani, M. Rini, V. Degiorgio, �??High-power cascaded Raman fiber laser using phosphosilicate fiber,�?? Electron. Lett. 40, 738-739 (2004).
[CrossRef]

European Conference

E. M. Dianov, �??Germania-based fiber Raman lasers: recent results and prospects,�?? European Conference on Optical Communication, We1.3.1, 292-295 (2004).

IEEE J. Lightwave Technol.

J. Bromage, �??Raman amplification for fiber communications systems,�?? IEEE J. Lightwave Technol. 22, 79-93 (2004).
[CrossRef]

Z. Xiong, N. Moore, Z. G. Li, G. C. Lim, �??10-W Raman fiber lasers at 1248 nm using phosphosilicate fibers,�?? IEEE J. Lightwave Technol. 21, 2377-2381 (2003).
[CrossRef]

J. Opt. Soc. Am. B

Opt. Comm.

Y. Li, S. D. Jackson, S. Fleming, �??Characterization of a Nd3+-doped fiber laser incorporating an etalon formed between the fiber facet and dielectric mirror,�?? Opt. Comm. 240, 385-389 (2004).

Opt. Express

Opt. Lett.

Other

G. P. Agrawal, Nonlinear Fiber Optics (Academic Press, San Diego, 2001).

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