A. Asseh et al., A WRITING TECHNIQUE FOR LONG-FIBER BRAGG GRATINGS WITH COMPLEX REFLECTIVITY PROFILES, Journal of lightwave technology, 15(8), 1997, pp. 1419-1423
We have developed and demonstrated a novel technique to manufacture ve
ry long gratings with a nearly arbitrary reflectivity profile. The tec
hnique is based upon writing a set of consecutive sub-gratings with in
terferometric control of the relative position of each sub-grating.