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Optimization of Fiber Bragg Gratings Using a Hybrid Optimization Algorithm

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5 Author(s)
Nam Quoc Ngo ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore ; Rui Tao Zheng ; Ng, J.H. ; Tjin, S.C.
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A new hybrid optimization algorithm is proposed for the design of a fiber Bragg grating (FBG) with complex characteristics. The hybrid algorithm is a two-tier search that employs a global optimization algorithm (i.e., the Staged Continuous Tabu Search (SCTS) algorithm) and a local optimization method (i.e., the Quasi-Newton method). First, the SCTS global optimization algorithm is used to find a "promising" FBG structure that has a spectral response as close as possible to the targeted spectral response. Then, a local optimization method, namely, the Quasi-Newton method, is applied to further optimize the promising FBG structure obtained from the SCTS algorithm to arrive at a targeted spectral response. To demonstrate the effectiveness of the method, the design and fabrication of an optical bandpass filter are presented

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Lightwave Technology, Journal of  (Volume:25 ,  Issue: 3 )