'A'
Title: Electrically and mechanically induced long period gratings in liquid crystal photonic bandgap fibers
Author(s): Noordegraaf D (Noordegraaf, Danny), Scolari L (Scolari, Lara), Laegsgaard J (Laegsgaard, Jesper), Rindorf L (Rindorf, Lars), Alkeskjold TT (Alkeskjold, Thomas Tanggaard)
Source: OPTICS EXPRESS 15 (13): 7901-7912 JUN 25 2007  
Authors' address:
Tech Univ Denmark, Dept Commun Opt & Mat, DK-2800 Lyngby, Denmark

'B'
Title: Electrically controllable long-period liquid crystal fiber gratings
Author(s): Jeong Y, Yang BC, Lee B, Seo HS, Choi S, Oh K
Source: IEEE PHOTONICS TECHNOLOGY LETTERS 12 (5): 519-521 MAY 2000