Dispersion-shifted (DS) single-mode fibers are designed to have low dispersion and low attenuation in the 1550-nm wavelength region. To achieve this, these fibers require complex index profiles and may, therefore, exhibit characteristics that are different from those observed in unshifted fibers with generally simple index profiles.1 Although DS fibers are optimized for operation at 1550 nm, it is generally considered useful to have the 1300-nm wavelength region also available for transmission. We, therefore, studied the cutoff wavelength behavior of a DS fiber with triangular-index core and a higher-index ring surrounding the core.2 The results of the study show that for the bend diameter of 28 cm, used for specifying the cutoff wavelength of unshifted fibers as recommended by CCITT,3 the cutoff region of the DS fiber investigated exhibits an interesting hump which may impact on the definition of the cutoff wavelength of this fiber.

© 1988 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription