We estimate the effect of Ge doping on the acoustic damping coefficient of silica fibers. We show that an acoustically multimode fiber with a characteristic central index dip, such as that observed in modified chemical-vapor deposition (MCVD)-type fibers, can provide adequate data for a reasonable estimation. This may result from the fact that the scattering integral of each acoustic mode in such a waveguide is strongly position-dependent in the radial direction where there is a varying Ge content.
© 2009 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: December 17, 2008
Revised Manuscript: April 18, 2009
Manuscript Accepted: June 19, 2009
Published: July 22, 2009
Peter D. Dragic, "Estimating the effect of Ge doping on the acoustic damping coefficient via a highly Ge-doped MCVD silica fiber," J. Opt. Soc. Am. B 26, 1614-1620 (2009)