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A novel and simple design technique for triangular spectrum response of fibre Bragg grating (FBG) is presented based on a linear chirped grating. It is shown that this method is fast and can give a straightforward solution to meet a design target. The numerical simulation examples verified the effectiveness of the design method. A general approach to design for multichannel triangular spectral responses for FBG filters is proposed, which provides a solution that achieves a minimum change of refractive index for the fibre.
Wu,Q.,Farrell, G. & Semenova, Y. (2010) Simple design technique for a triangular FBG filter based on a linearly chirped grating, Optics Communications vol.283, no.6, pp. 985-992. doi:10.1016/j.optcom.2009.11.038