Optical Transfer Function: A New Proposal for Identification of Complex Brag Gratings Using Genetic Algorithm (Optimization)

Authors: Rostamiand, A.; Yazdanpanah-Goharrizi, A.

Source: Journal of Electromagnetic Waves and Applications, Volume 22, Number 4, 2008 , pp. 599-613(15)

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Abstract:

In this paper an optical transfer function for description of the operation of complex fiber Bragg Gratings similar to electrical ones is presented (H(jω)). For this purpose and reconstruction of the transfer function, the Genetic Algorithm (GAs) is used to find optimum number of poles and zeros from the measured reflection coefficient. After building the transfer function according to the developed algorithm in this paper, the reflection coefficient for this approximated system is obtained (simulated) and compared with measured values. The results obtained from the approximated transfer function in these cases are so close to real measured data. So, the presented method introduces an interesting approach for identification of the complex Bragg Gratings in frequency domain. Some of optical characteristics (both frequency domain and time domain parameters) of these systems can be extracted from the approximated transfer function easily.

Document Type: Research article

DOI: http://dx.doi.org/10.1163/156939308784150290

Affiliations: 1: Photonics and Nanocrystals Research Lab. (PNRL), Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz 51664, Iran

Publication date: 2008-04-01