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.
© 2004 Optical Society of America
Original Manuscript: June 26, 2003
Revised Manuscript: December 3, 2003
Published: March 20, 2004
Mohammad I. Braiwish, Brent L. Bachim, and Thomas K. Gaylord, "Prototype CO2 laser-induced long-period fiber grating variable optical attenuators and optical tunable filters," Appl. Opt. 43, 1789-1793 (2004)