title: Prototype CO2 laser-induced long-period fiber grating variable optical attenuators and optical tunable filters.
abstract: Prototype devices capable of variable attenuation at a fixed wavelength, wavelength tuning at a constant attenuation, and combinations of these spectral characteristics are demonstrated in CO2 laser-induced long-period fiber gratings (LPFGs). These devices are based on controlled flexure by means of a piezoceramic platform. CO2 laser-induced LPFG characteristics along with the fabrication and testing processes of these gratings are discussed. Devices with a optical attenuation of 13 dB and a wavelength tuning of 7 nm are reported.
authors.affiliation: School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0250, USA.
authors.forename: Mohammad I
authors.initials: MI
authors.lastname: Braiwish
authors.forename: Brent L
authors.initials: BL
authors.lastname: Bachim
authors.forename: Thomas K
authors.initials: TK
authors.lastname: Gaylord