Direct design of high channel-count fiber Bragg grating filters with low index modulation


A novel method for designing high channel-count fiber Bragg gratings (FBGs) is proposed. For the first time, tailored group delay is introduced into the target reflection spectra to obtain a more even distribution of the refractive index modulation. This approach results in the reduction of the maximum refractive index modulation to physically realizable levels. The maximum index modulation reduction factors are all greater than 5.5. This is a significant improvement compared with previously reported results. Numerical results show that the thus designed high channel-count FBG filters exhibit superior characteristics including 30 dB channel isolation, a flat-top and near 100% reflectivity in each channel.

Publication DOI:
Divisions: Engineering & Applied Sciences > Aston Institute of Photonics Technology
Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Uncontrolled Keywords: fiber Bragg gratings,wavelength filtering devices,optical communications,Atomic and Molecular Physics, and Optics
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.osa ... =oe-20-11-12095 (Publisher URL)
PURE Output Type: Article
Published Date: 2012-05-21
Published Online Date: 2012-05-11
Authors: Cao, Hui
Atai, Javid
Shu, Xuewen
Chen, Guojie


Item under embargo.

Export / Share Citation


Additional statistics for this record