• A Novel Birefrigent Photonic Crystal Fiber Surface Plasmon Resonance Biosensor

      Otupiri, R.; Akowuah, E. K.; Haxha, S.; Ademgil, H.; AbdelMalek, F.; Aggoun, A. (IEEE, 2014-08)
      A numerical analysis of a novel birefringent photonic crystal fiber (PCF) biosensor constructed on the surface plasmon resonance (SPR) model is presented in this paper. This biosensor configuration utilizes circular air holes to introduce birefringence into the structure. This PCF biosensor model shows promise in the area of multiple detection using HEx 11 and HEy 11 modes to sense more than one analyte. A numerical study of the biosensor is performed in two interrogation modes: amplitude and wavelength. Sensor resolution values with spectral interrogation yielded 5 10 5 RIU (refractive index units) for HEx 11 modes and 6 10 5 RIU for HEy 11 modes, whereas 3 10 5 RIU for HEx 11 modes and 4 10 5 RIU for HEy 11 modes are demonstrated for the amplitude interrogation.
    • Multi-channel photonic crystal fiber based surface plasmon resonance sensor for multi-analyte sensing

      Yasli, A; Ademgil, H; Haxha, S; Aggoun, A (Institute of Electrical and Electronics Engineers (IEEE), 2019-12-20)
      © 2009-2012 IEEE. In this paper, we report a unique multi-channel Photonic Crystal Fibre (PCF) sensor based on Surface Plasmon Resonance (SPR) structure comprising of silver and gold doped plasmonic layers for multi-Analyte sensing applications. We deployed a Full Vectorial Finite Element Method (FV-FEM) to investigate the sensitivity performance of the proposed PCF sensor. The SPR sensor is fully optimised to ensure propagation features, such as confinement loss, resonance condition, resolution and sensitivity are investigated within various optimised design parameters. According to spectral sensitivity analyses, 2500 nm/RIU and 3083 nm/RIU with 4 × 10-5 RIU and 3.2 × 10-5 RIU resolutions are obtained for Channel 1 (Ch1) (x-polarized) and Channel 2 (Ch2) (y-polarized), respectively.
    • Novel Method for Improving the Capacity of Optical MIMO System Using MGDM

      Baklouti, F.; Dayoub, I.; Haxha, S.; Attia, R.; Aggoun, A. (IEEE, 2014-12)
      In current local area networks, multimode fibers (MMFs), primarily graded index (GI) MMFs, are the main types of fibers employed for data communications. Due to their enormous bandwidth, it is considered that they are the main channel medium that can offer broadband multiservices using optical multiplexing techniques. Amongst these, mode group diversity multiplexing (MGDM) has been proposed as a way to integrate various services over an MMF network by exciting different groups of modes that can be used as independent and parallel communication channels. In this paper, we study optical multiple-input–multiple-output (O-MIMO) systems using MGDM techniques while also optimizing the launching conditions of light at the fiber inputs and the spot size, radial offset, angular offset, wavelength, and the radii of the segment areas of the detectors. We propose a new approach based on the optimization of launching and detection conditions in order to increase the capacity of an O-MIMO link using the MGDM technique. We propose a (3 3) O-MIMO system, where our simulation results show significant improvement in GI MMFs' capacity compared with existing O-MIMO systems.