Multi-channel fiber Bragg gratings for dispersion and slope compensation

We have demonstrated the fabrication of multichannel fibre Bragg gratings (FBGs) in which the dispersion and the central wavelength are adjusted in each channel. The multi-channel character is achieved by superimposing many gratings on a section of an optical fiber. The adjustment of the central wavelength is precise within /spl plusmn/10 pm. The precision of the dispersion adjustment is close to /spl plusmn/2% which renders possible third-order dispersion compensation.