OPTICAL WAVEGUIDE TYPE WAVELENGTH DISPERSION COMPENSATION DEVICE AND METHOD FOR MANUFACTURING THE SAME

摘要

An optical waveguide type wavelength dispersion compensation device has an optical waveguide as a reflection type wavelength dispersion compensation means in which an equipment refraction index of a core changes unevenly over a light transmitting direction by changing a physical size of the core embedded in a clad. The core is designed in the following: (a) first, a first desired reflection spectrum is set with transmission losses neglected and an optical wavelength possible to compensate wavelength dispersion of an optical fiber to be compensated is then designed; (b) a wavelength dependency characteristic of a transmission loss in this optical waveguide is derived from an effective length of the optical waveguide designed in the process (a); and (c) next, a reverse dependency characteristic of the wavelength dependency is added to the first reflection spectrum to correct a second reflection spectrum and an equivalent refraction index distribution of the optical waveguide designed in the process (a) is re-designed by using the second reflection spectrum.