We report theoretical and experimental analysis on Brillouin frequency shift in silica optical fibers with the double cladding structures that are comprised of GeO₂-doped core, P₂O₅- and F-codoped inner cladding and silica outer cladding. The intrinsic Brillouin frequency shift was calculated for various fiber parameters utilizing boundary conditions for longitudinal acoustic waves. Optical fibers with different fiber parameters were fabricated and the Brillouin frequency shifts were measured in the wavelength region of 1.55μm. We confirmed that the inner cladding in an optical fiber could provide a new degree of freedom in controlling the Brillouin frequency shift.

© 2002 Optical Society of America

1. S. J. Strutz, and K. J. Williams, �??Low-noise hybrid erbium/Brillouin amplifier,�?? Electron. Lett. 36, 1359-1360 (2000). [CrossRef]
2. G. J. Cowle, D. Y. Stepanov, and Y. T. Chieng, �??Brillouin/Erbium Fiber Lasers,�?? J. Lightwave Technol. 15, 1198-1204 (1997). [CrossRef]
3. B. Min, P. Kim, and N. Park, �??Flat amplitude equal spacing 798-channel Rayleigh-assited Brillouin/Raman multiwavelength comb generation in dispersion compensation fiber,�?? IEEE Photon. Technol. Lett. 13, 1352-1354 (2001). [CrossRef]
4. H. H. Kee, G. P. Lees, and T. P. Newson, �??All-fiber system for simultaneous interrogation of distributed strain and temperature sensing by spontaneous Brillouin scattering,�?? Opt. Lett. 25, 1-3 (2000). [CrossRef]
5. M. Nikles, L. Thevenaz, and P. A. Robert, �??Brillouin gain spectrum characterization in single-mode optical fibers,�?? J. Lightwave Technol. 15, 1842-1851 (1997). [CrossRef]
6. K. Shiraki, M. Ohashi, and M. Tateda, �??Suppression of stimulated Brillouin scattering in a fiber by changing the core radius,�?? Electron. Lett. 31, 668-669 (1995). [CrossRef]
7. G. P. Agrawal, Nonlinear Fiber Optics (Academic Press, 1950), Chap. 9.
8. P. J. Thomas, N. L. Rowell, H. M. van Driel, and G. I. Stegeman, �??Normal acoustic modes and Brillouin scattering in single-mode optical fibers,�?? Phys. Rev. B 19, 4986-4998 (1979). [CrossRef]
9. B. A. Auld, Acoustic Fields and Waves in Solids (John Wiley-Sons, 1973).
10. A. Safaai-Jazi, and R. O. Claus, �??Acoustic modes in optical fiberlike waveguides,�?? IEEE Trans. Ultrason., Ferroelec., Freq. Contr. 35, 619-627 (1988). [CrossRef]
11. Y. Park, K. Oh, U. C. Paek, D. Y. Kim, and C. R. Kurkjian, �??Residual stresses in a doubly clad fiber with depressed inner cladding (DIC),�?? J. Lightwave Technol. 17, 1823-1833 (1999). [CrossRef]
12. S. P. Timoshenko, and J. N. Goodier, Theory of Elasticity (McGraw Hill, 1970).
13. D. Cotter, �??Stimulated Brillouin scattering in monomode optical fiber,�?? J. Opt. Commun. 4, 10-19 (1983).
14. G. W. McLellan, and E. B. Shand, Glass Engineering Handbook (McGraw Hill, 1984).

Electron. Lett.

• S. J. Strutz, and K. J. Williams, �??Low-noise hybrid erbium/Brillouin amplifier,�?? Electron. Lett. 36, 1359-1360 (2000). [CrossRef]
• K. Shiraki, M. Ohashi, and M. Tateda, �??Suppression of stimulated Brillouin scattering in a fiber by changing the core radius,�?? Electron. Lett. 31, 668-669 (1995). [CrossRef]

IEEE Photon. Technol. Lett.

• B. Min, P. Kim, and N. Park, �??Flat amplitude equal spacing 798-channel Rayleigh-assited Brillouin/Raman multiwavelength comb generation in dispersion compensation fiber,�?? IEEE Photon. Technol. Lett. 13, 1352-1354 (2001). [CrossRef]

IEEE Trans. Ultrason., Ferroelec., Freq.

• A. Safaai-Jazi, and R. O. Claus, �??Acoustic modes in optical fiberlike waveguides,�?? IEEE Trans. Ultrason., Ferroelec., Freq. Contr. 35, 619-627 (1988). [CrossRef]

J. Lightwave Technol.

• Y. Park, K. Oh, U. C. Paek, D. Y. Kim, and C. R. Kurkjian, �??Residual stresses in a doubly clad fiber with depressed inner cladding (DIC),�?? J. Lightwave Technol. 17, 1823-1833 (1999). [CrossRef]
• M. Nikles, L. Thevenaz, and P. A. Robert, �??Brillouin gain spectrum characterization in single-mode optical fibers,�?? J. Lightwave Technol. 15, 1842-1851 (1997). [CrossRef]
• G. J. Cowle, D. Y. Stepanov, and Y. T. Chieng, �??Brillouin/Erbium Fiber Lasers,�?? J. Lightwave Technol. 15, 1198-1204 (1997). [CrossRef]

J. Opt. Commun.

• D. Cotter, �??Stimulated Brillouin scattering in monomode optical fiber,�?? J. Opt. Commun. 4, 10-19 (1983).

Opt. Lett.

• H. H. Kee, G. P. Lees, and T. P. Newson, �??All-fiber system for simultaneous interrogation of distributed strain and temperature sensing by spontaneous Brillouin scattering,�?? Opt. Lett. 25, 1-3 (2000). [CrossRef]

Phys. Rev. B

• P. J. Thomas, N. L. Rowell, H. M. van Driel, and G. I. Stegeman, �??Normal acoustic modes and Brillouin scattering in single-mode optical fibers,�?? Phys. Rev. B 19, 4986-4998 (1979). [CrossRef]

Other

• B. A. Auld, Acoustic Fields and Waves in Solids (John Wiley-Sons, 1973).
• G. P. Agrawal, Nonlinear Fiber Optics (Academic Press, 1950), Chap. 9.
• G. W. McLellan, and E. B. Shand, Glass Engineering Handbook (McGraw Hill, 1984).
• S. P. Timoshenko, and J. N. Goodier, Theory of Elasticity (McGraw Hill, 1970).

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