Evaluation of chromatic dispersion in W-type fibers, based on the assumption that waveguide and material dispersion are additive effects, is examined. Actual and approximate dispersion of the LP01 mode are calculated and compared for three W fibers. For two fibers the errors introduced by the approximate method are substantial, even larger than the total dispersion at most wavelengths in the range 1.1 μm < λ < 1.6 μm. For a third fiber, however, the agreement between the actual and approximate results is close. It is shown that the accuracy of the approximate method improves if the wavelength derivatives of the index differences become smaller.
© 1989 Optical Society of America
Original Manuscript: February 7, 1989
Manuscript Accepted: May 3, 1989
Published: July 15, 1989
A. Safaai-Jazi and L. J. Lu, "Evaluation of chromatic dispersion in W-type fibers," Opt. Lett. 14, 760-762 (1989)