Abstract
One of the largest off resonant nonlinear effects attributed to a third order nonlinear process has been reported in a DAN single crystal core fiber.1,3 Such fiber, designed for efficient second harmonic generation,3 showed large spectral broadening effects when femtosecond pulses around 625 nm were launched into it. Yamashita et al. compared the observed spectral broadening to that of a standard fused silica fiber and reported an intensity dependent refractive index 17000 times larger than that of fused silica.
© 1994 Optical Society of America
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