Abstract
We have used the photorefractive two-beam-coupling technique to measure the nonlinear coefficient of several telecommunication fibers and investigated the dependence of on Er, Al, and Ge doping profiles in single-mode fibers, where is the nonlinear refractive index and is the effective area of the mode. A semiempirical relation is derived for predicting the value of as a function of Er, Al, and Ge content in optical fibers. We have further examined the wavelength dependence of in pure and doped silica fibers between 1064 and and found that the value of doped fibers changes more markedly with wavelength than that of pure-silica fibers.
© 2005 Optical Society of America
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