We have investigated the dispersion and the nonlinearity properties of the subwavelength-diameter optical fiber (SDOF)
with high-index-contrast dielectric thin films. The dispersion length and the nonlinearity length have been calculated to
discuss the propagation properties of pulse in SDOF. The waveguide dispersion and nonlinearity analysis is used to
guide the waveguide dimension design for possible applications. The high nonlinearity of SDOF makes it especially
suitable for nonlinearity devices.