We propose a flexible method for fabricating complex fiber grating structures based on sequential writing for fiber gratings with polarization control of the UV source beam. Pure apodized as well as arbitrary phase-shifted fiber Bragg gratings (FBGs) can be fabricated in a single scan. Experimental examples of raised- cos<sup>2</sup> apodized and dispersionless FBG filters are given to demonstrate the feasibility of this method.
© 2004 Optical Society of America
(050.2770) Diffraction and gratings : Gratings
(050.5080) Diffraction and gratings : Phase shift
(220.1230) Optical design and fabrication : Apodization
(230.1480) Optical devices : Bragg reflectors
Kai-Ping Chuang, Yinchieh Lai, and Lih-Gen Sheu, "Complex fiber grating structures fabricated by sequential writing with polarization control," Opt. Lett. 29, 340-342 (2004)