Abstract
In this paper, we review our recent developments in the design and fabrication techniques for
high-channel-count fiber Bragg gratings (FBGs). We have presented a theory for the phase-only sampled FBG and
demonstrated that a sampled FBG of <i>N</i> channels would require
√N/η times higher maximum reflective index
modulation than that of the single-channel FBG. We experimentally demonstrate a 45- and 81-channel linearly chirped
FBG for nearly whole C-band dispersion compensation, which is fabricated with a novel diffraction precompensated
phase mask. The grating specifications obtained agree well with the theoretical design. We have presented a novel
method for multichannel FBG design, which enables us to design any kind of multichannel FBGs, where the spectrum
response of each channel could be either identical or nonidentical. Particularly, the nine-channel nonlinearly
chirped FBG, which is used as a simultaneous dispersion and dispersion slope compensator, has been demonstrated.
© 2007 IEEE
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