Title :
Measurement of the nonlinear refractive index of long dispersion-shifted fibers by self-phase modulation at 1.55 μm
Author :
Stolen, Roger H. ; Reed, William A. ; Kim, Kwang S. ; Harvey, G.T.
Author_Institution :
AT&T Labs. Res., Red Bank, NJ, USA
fDate :
6/1/1998 12:00:00 AM
Abstract :
We measure a value of N2=2.45×10-16 cm 2/W (±5%) by self-phase modulation (SPM) in two 20 km dispersion-shifted fibers for random polarization at 1.55 μm. There is still some dispersive broadening and we find that an accurate determination of N2 requires fitting the experimental (SPM) spectra with a computer simulation to account for the variation in pulse shape and fiber properties along the length of the fiber. We also show that spectral information provides information about the input pulse properties
Keywords :
nonlinear optics; optical fibre communication; optical fibre dispersion; optical fibre polarisation; optical fibre testing; optical modulation; phase modulation; refractive index measurement; 1.55 mum; 20 km; accurate determination; computer simulation; dispersion-shifted fibers; dispersive broadening; experimental spectra; fiber properties; input pulse properties; long dispersion-shifted fibers; nonlinear refractive index measurement; pulse shape; random polarization; self-phase modulation; spectral information; Area measurement; Dispersion; Length measurement; Optical fiber polarization; Optical pulse shaping; Pulse amplifiers; Pulse measurements; Refractive index; Scanning probe microscopy; Wavelength measurement;
Journal_Title :
Lightwave Technology, Journal of
