A high channel-count comb filter based on multi-concatenated sampled chirped fiber Bragg gratings (MC-SCFBGs) is proposed and optimally designed by using several chirped gratings with different fundamental grating periods, instead of non-grating sections of SCFBGs. The numerical simulations of the reflection spectra show that the channel spacing and the channel bandwidth in MC-SCFBGs are smaller than those in multi-concatenated chirped fiber Bragg gratings (MC-CFBGs) and that the spectral bandwidth of MC-SCFBGs can be greatly broadened by increasing the cascade number of the grating sections in each sampling period.
© 2011 Chinese Optics Letters
(060.2340) Fiber optics and optical communications : Fiber optics components
(350.2460) Other areas of optics : Filters, interference
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
Hongwei Yuan, Jun Zhou, Weitao Ma, Yongtang Sun, and Tiefeng Xu, "High channel-count comb filter based on multi-concatenated sampled chirped fiber Bragg gratings," Chin. Opt. Lett. 9, 080601-080601 (2011)