Examinando por Autor "González Reyes, Luz Esther"
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- PublicaciónSólo datosDesign of Multi-core Fiber Patch Panel for Space Division Multiplexing Implementations(Fiber and Integrated Optics, 2018-03-04) González Reyes, Luz Esther; Morales, Alvaro; Rommel, Simon; Jørgensen, Bo F.; Porras-Montenegro, Nelson; Tafur Monroy, IdelfonsoA multi-core fiber (MCF) patch panel was designed, allowing easy coupling of individual signals to and from a 7-core MCF. The device was characterized, measuring insertion loss and cross talk, finding highest insertion loss and lowest crosstalk at 1300 nm with values of 9.7 dB and -36.5 dB respectively, while at 1600 nm insertion loss drops to 4.8 dB and crosstalk increases to -24.1 dB. Two MCF splices between the fan-in module, the MCF, and the fan-out module are included in the characterization, and splicing parameters are discussed.
- PublicaciónSólo datosOptical Response of 1D Photonic Crystals Based on Cu3TMSe4 (TM =V, Nb, Ta) Sulvanite Compounds in the Infrared Spectral Region(Journal of Nanoelectronics and Optoelectronics, 2018-06-06) González Reyes, Luz Esther; Porras-Montenegro, NelsonIn this work, optical properties such as transmission, reflection and absorption of 1D photonic crystals consisting of Cu3TMSe4 (TM = V, Nb, Ta) sulvanite compounds and air have been studied. The influence of thickness, number of periods N, and incident angle of light for both TE and TM polarizations have been theoretically investigated using the transfer-matrix formalism. The results show optical response for frequencies located in the infrared region where the dissipative effects are low, high transmission intensity in the TE mode for light normal incidence and for TM polarization, a tunable gap and an enlarged transmission with the increase of the incidence angle. We believe these findings in 1D air-sulvanite photonic crystals can be used in future infrared technological applications.
- PublicaciónSólo datosYBa2Cu3O7−x/BaTiO3 1D Superconducting Photonic Crystal with Tunable Broadband Response in the Visible Range(Journal of Superconductivity and Novel Magnetism, 2018-07-01) González Reyes, Luz Esther; Ordoñez, J. E.; Zambrano, Gustavo; Porras-Montenegro, NelsonBased on the transfer matrix method, we studied theoretically the transmittance of a 1D photonic crystal (PC), consisting of alternating layers of a dielectric material (BaTiO3) and a superconductor (YBa2Cu3O7−x ). The dielectric properties of this system are described by the two fluid model. We have investigated the transmittance intensity and its bandwidth dependence on the superconductor thickness, incident angle, and temperature in the PC. It was found that the electromagnetic wave propagation can be controlled to be forbidden or allowed in certain wavelengths in the visible and ultraviolet range, and the photonic band gap (PBG) width can also be tuned varying these parameters. We showed that by increasing the thickness of the superconductor layer it is possible to control the number of PBGs in the structure. Also, we found that the frequency ranges of PBGs are sensitive to the incident angle and the polarization of the electromagnetic waves; the bandwidth of PBGs can be notably enlarged by increasing the angle in the TE polarization, but narrowed in the TM one. Additionally, we found that transmission is not markedly affected by temperature variation, but small shifts in the PBGs are presented. We hope these results can be of technical use for developing potential applications in optoelectronic devices