Title :
Flat-top / distortionless tunable filters based on liquid crystal multi cavities for DWDM applications
Author :
Alboon, Shadi A. ; Lindquist, Robert G.
Author_Institution :
Univ. of Alabama in Huntsville, Huntsville
Abstract :
Tunable Alters are one of the essential components in the DWDM systems. In this paper two types of tunable Alters are discussed. First the multi cavities coupled Fabry-Perot band pass Alters using liquid crystal are investigated to achieve tunable Aat top Altering performance across the C and L bands with a ripple less than 0.01 dB, and wide overall tuning range of 172 nm. Several designs are shown with comparable performance to the commercial Axed single channel Alters. The second one is the tunable liquid crystal optical interleaver Alter based on the combined Michelson interferometer (MI) and the Gires-Tournois interferometer (GTI). Liquid crystal is used to achieve the center wavelength shift of the interleaver Alter with less than 0.1 dB ripples in the pass band.
Keywords :
Fabry-Perot interferometers; Michelson interferometers; band-pass filters; liquid crystals; wavelength division multiplexing; DWDM systems; Gires-Tournois interferometer; Michelson interferometer; distortionless tunable filters; flat top tunable filters; liquid crystal multicavities; multicavities coupled Fabry-Perot band pass filters; tunable liquid crystal optical interleaver filter; Band pass filters; Filtering; Liquid crystals; Optical distortion; Optical films; Optical filters; Optical interferometry; Optical tuning; Tunable circuits and devices; Wavelength division multiplexing;
Conference_Titel :
Southeastcon, 2008. IEEE
Conference_Location :
Huntsville, AL
Print_ISBN :
978-1-4244-1883-1
Electronic_ISBN :
978-1-4244-1884-8
DOI :
10.1109/SECON.2008.4494270
