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 CO<sub>2</sub> laser-induced long-period fiber gratings (LPFGs). These devices are based on controlled flexure by means of a piezoceramic platform. CO<sub>2</sub> 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
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)