'A"
Title: Dual-peak long-period fiber gratings with enhanced refractive index sensitivity by finely tailored mode dispersion that uses the light cladding etching technique
Author(s): Chen XF (Chen, Xianfeng), Zhou KM (Zhou, Kaiming), Zhang L (Zhang, Lin), Bennion I (Bennion, Ian)
Source: APPLIED OPTICS 46 (4): 451-455 FEB 1 2007
Aston Univ, Dept Elect Engn, Birmingham B4 7ET, W Midlands England

'B'
Title: Control of the characteristics of a long-period grating by cladding etching
Author(s): Kim SC, Jeong YC, Kim SW, Kwon JJ, Park NK, Lee B
Source: APPLIED OPTICS 39 (13): 2038-2042 MAY 1 2000