Multiband filter at adjustable free spectral range by convolution of transfer functions according to the Vernier effect

Ouariach, Abdelaziz; Ghoumid, Kamal; Malek, Rachid; Moussati, Ali El; Nougaoui, A.; Gharbi, Tijani

doi:10.1049/iet-opt.2015.0043

Cited by 4 publications

(1 citation statement)

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“…Another area for the use of the Bragg filters is that of wavelength multiplexers and demultiplexers that make in-line optical filters, particularly band-pass filters and wavelengthspecific reflectors. Several researches have been carried out in the field of narrowband Bragg filters, among these latter are the narrowband Bragg filters fabricated with (in designates the place of fabrication) Ti:LiNbO 3 with weak modulation index which was the subject of our previous work [29][30][31][32][33]. The technique consists of modulating the index profile by micro-structuring an upper layer deposited on the propagation channel (optical fiber or waveguide) in order to realize optical filters with very narrow bandwidths.…”

Section: Narrowband Bragg Filtermentioning

confidence: 99%

A 60 GHz RoF generation system based on optical beat of narrowband Bragg filters

et al. 2019

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Radio over fiber is considered as a very promising technology that will indisputably compete as a viable solution for the distribution of current and future broadband wireless communication systems. In this paper, we propose a new millimeter-wave generation system: the 60 GHz system which is based on two narrowband Bragg filters forming with the coupler a Y system. The millimeter wave is obtained by the optical beat technique detection of two optical waves. The frequency interval between the two waves generated by the Bragg filters gives the 60 GHz millimeter wave. The simulation results demonstrate that an optimal BER less than 10 −9 for different values of flow rate and a good quality factor Q can be reached by using Bragg filters with a very narrow band. In addition, we simulate the 60 GHz system for various lengths of optical fiber. The eye diagram remains clear and open for fiber lengths that reach 50 km.

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