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Tunable Super-Structured Fiber Bragg Gratings with Perfect Sequences Based on m-Sequence

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Resumo:Recently, a tunable fiber Bragg grating (FBG) was developed by using stress-responsive colloidal crystals. In this paper, we have simulated the application of these nanoparticles into the super-structured fiber Bragg grating (SSFBG) written with perfect sequences derived from a short maximal-length sequence. A tunable SSFBG will be available to overcome the prohibitive temperature variation of the optical codecs. Nevertheless, we presented a method to implement coherent time spreading optical code-division multiple-access (OCDMA) where a unique code (or perfect sequence) can be reused and mixed with different wavelengths to obtain a tunable wavelength-division multiplexing (WDM) system. In order to maximize the binary throughput, we have selected a unique short maximal-length sequence composed of 7 chips that can be tuned with 7 different optical wavelengths. We found thousands of different tunable combinations that presented power contrast ratios (P/C) higher than 12 dB. When a WDM-OCDMA system used 2 different combinations simultaneously, the perfect binary detection with error correction codes was achieved successfully. The tunable SSFBG with colloidal crystals will be a simple and good alternative choice for fiber-to-the-home (FTTH) communications.
Autores principais:Pereira, João S.
Outros Autores:Ferreira, Marco P. M.; Gasparovic, Marko
Assunto:Optical code-division multiple-access (OCDMA) super-structured fiber Bragg grating (SSFBG) wavelength-division multiplexing OCDMA (WDM-OCDMA)
Ano:2017
País:Portugal
Tipo de documento:artigo original
Tipo de acesso:acesso aberto
Instituição associada:Universidade de Leiria e Oeste
Idioma:inglês
Origem:IC-online

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