The Design and Fabrication of Fibonacci Quasi-Periodic Superstructure Fiber Bragg Gratings

Superstructure fiber Bragg gratings constructed following the Fibonacci sequence were designed and fabricated in photosensitive single mode optical fiber by phase mask scanning technique. The reflectivity of the gratings showed the six-cycle property with respect to the Fibonacci sequence order at the central wavelength 1541.86 nm. The reflection spectra were multi-fractal and self-similar with scaling. The fabricated device is compact, stable, cost effective, and its spectral profile is easy to control. It can be used as C-band optical fiber filters with a spectral self similarity.