Abstract

Measurements of backscattered Raman amplified spontaneous emission in single-mode dual-hole-assisted fiber indicate suppression of Raman gain by more than two orders of magnitude compared to SMF. These results imply that fiber lasers based on the dual-hole-assisted fiber design are effectively immune to SRS, thus enabling significant power scaling beyond current limits from a single-mode core.

© 2005 Optical Society of America

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References

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2002 CLEO Technical Digest (1)

N.S. Platonov, D.V. Gapontsev, V.P. Gapontsev and V. Shumilin, �??135W CW fiber laser with perfect single-mode output,�?? CLEO Technical Digest, 2002, paper CPDC3, p. 31-34

ASSP 2004 (1)

D.T. Walton, S. Gray, L.A. Zenteno, X. Chen, M-J. Li, D.A. Nolan, G.E. Berkey, J. Wang, J. Koh, W. and C. Tennent, �??High power, linearly polarized Yb-doped fiber laser,�?? OSA Trends in Optics and Photonics Series, v. 94, Advanced Solid-State Photonics Conference Proceedings (2004) p. 104-107, Santa Fe, NM, USA

Electron. Lett. (1)

S.R. Chin, �??Analysis of counter-pumped small-signal fibre Raman amplifiers,�?? Electron. Lett. 33, 7 (1997) p. 607-608

J. Opt. Soc. Am. (1)

LEOS 2004 (1)

L.A. Zenteno, W.A Wood, J. Wang , D.T. Walton , C.L. Tennent , D.A. Nolan , M.J. Li, , J. Koh, X. Chen and G.E. Berkey, �??High Power Single Polarization Fiber Lasers,�?? Invited Paper ThP1, LEOS Annual Meeting Conference Proceeedings (2004) p. 867-868

Opt. Lett. (1)

Proc SPIE (1)

V. Bhagavatula, R. Bhat, G.E. Berkey, X. Chen, M.J. Dejneka, M. Gallagher, L.C. Hughes, K.W. Koch, J. Koh, M.J. Li, X. Liu, D.A. Nolan, M.H. Rasmussen, C.L. Tennent, N. Venkataraman, D.T. Walton, J. Wang, C.E. Zah and L.A. Zenteno, �??Progress in High Power Fiber Lasers,�?? Invited Paper at Fiber Lasers: Technology, Systems and Applications, Photonics West , January 2004, San Jose, CA, SPIE Proceedings, vol. 5335, (2004) p. 210-216, L.N Durvasula, Editor

Proc. SPIE (1)

M.-J. Li, D. A. Nolan, G. E. Berkey, X. Chen, J. Koh, D. T. Walton, J. Wang, W. A. Wood, and L. A. Zenteno , "High-performance single-polarization optical fibers," Proc. SPIE vol. 5623, (2005) pp. 612-621

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Figures (5)

Fig. 1.
Fig. 1.

Experimental set-up

Fig. 2.
Fig. 2.

Spectral transmission of hole-assisted fiber

Fig. 3.
Fig. 3.

Raman ASE spectrum of hole-assisted fiber and SMF-28R fiber

Fig. 4.
Fig. 4.

Cladding mode intensity distribution plotted vs fiber radius in micron

Fig .5.
Fig .5.

Normalized effective area vs fraction of power in the core

Equations (4)

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P ASE h Δ v { Exp [ ( γ R α s ) L ] 1 } 1 α s γ R
γ R = g R P A eff
A eff = I s d A I p d A I s I p d A
P th = A eff g R L eff ( α s L + Log 1 R 1 R 2 )

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