摘要
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 samDling Deriod.
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 samDling Deriod.
基金
supported by the National Natural Science Foundation of China (Nos. 60977048 and 60978058)
the Natural Science Foundation of Ningbo(No. 2008A610001)
the International Collaboration Project of Ningbo (No. 2010D10018)
the K. C.Wong Magna Fund in Ningbo University,China
