Open AccessWavelength-switchable flat-top fiber comb filter based on a Solc type birefringence combination
Author(s) -
Yong Wook Lee,
Hyun-Tak Kim,
Jaehoon Jung,
Byoungho Lee
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.001039
Subject(s) - optics , birefringence , comb filter , materials science , beam splitter , optical filter , wavelength , polarization (electrochemistry) , interleaving , filter (signal processing) , optical fiber , channel spacing , wavelength division multiplexing , physics , computer science , laser , chemistry , computer vision , operating system
In this paper a polarization-independent wavelength-switchable flat-top fiber comb filter is newly proposed, which is based on a Solc type birefringence combination and polarization-diversity loop configuration. The proposed filter consists of a polarization beam splitter, two concatenated polarization-maintaining fibers, and two half-wave plates. Our theoretical analysis shows that the proposed apparatus has a much flatter passband and sharper notch than the conventional Sagnac birefringence filter. Particularly, by interchanging the Solc type birefringence combination within the filter between the folded and fan designs, channel wavelength switching operation, more specifically channel interleaving operation, can be achieved through the proper adjustment of the half-wave plates contained within the apparatus. Theoretical prediction was verified by experimental demonstration.