Abstract
Understanding the nonlinear behavior of single-mode fiber is important in designing long-haul transmission systems using optical amplifiers.1 One of the manifestations of the nonlinear index in optical fibers is four-wave mixing of two or more carriers. Previous reported work in the area of four-wave mixing has used high optical intensities over relatively short fiber lengths. In our work we have measured four-wave mixing at realistic system-operating conditions, namely, power levels of 1 mW per laser and distances >1500 km. We find good agreement between our measurements and the theory of four-wave mixing, given in Ref. 5.
© 1992 Optical Society of America
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