Optical fiber dispersion/delay equalizer and its production

Abstract

Abstract PURPOSE:To obtain required highly accurate reflection characteristics at the removal of wavelength dispersion in optical fiber transmission by specifying the film thickness of a waveguide line formed on gratings attached on a base plate and controlling the reflection characteristics of the waveguide line while monitoring them. CONSTITUTION:Grating 11-16 to equalize the group delay time difference generated when the light with a subscribed wavelength width from a light source is transmitted through an optical fiber with length (l) and wavelength dispersion (s) are formed on a light waveguide line 1 attached on a base plate 1. If the wavelength to divide the wavelength area of the light source into (N-1) is lambdai (i=1-N) from the long wavelength side, the grating Gi with frequency LAMBDA attached on the position of Zi from the incident surface of the waveguide line is found from the shown and the film thickness of waveguide lines and positions on the gratings 11-16 can be decided. The film thickness of waveguide line is controlled and formed while monitoring the reflection characteristics of the light passing through the waveguide line in the process of thinfilm prepared on the base plate 2.

Inventors

• 👤 Nobuyuki Imoto
• 👤 Masahiro Ikeda

Bibliographic Details