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Listar por autor "Alonso-Ramos, Carlos"
Mostrando ítems 1-7 de 7
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Broadband fiber-chip zero-order surface grating coupler with 0.4 dB efficiency.
Sánchez-Postigo, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Luque-González, José Manuel; Molina-Fernández, Íñigo; Cheben, Pavel; Alonso-Ramos, Carlos A.; Halir, Robert; Schmid, Jens H.; Ortega-Moñux, Alejandro[et al.] (Optica Publishing Group, 2016-06-24)Surface grating couplers enable efficient coupling of light between optical fibers and nanophotonic waveguides. However, in conventional grating couplers, the radiation angle is intrinsically wavelength dependent, thereby ... -
Frequency-tuning dual-comb spectroscopy using silicon Mach-Zehnder modulators.
Deniel, Lucas; Weckenmann, Erwan; Pérez-Galacho, Diego; Alonso-Ramos, Carlos; Boeuf, Frederic; Vivien, Laurent; Marris-Morini, Delphine[et al.] (Optica, 2020)Dual-comb spectroscopy using a silicon Mach-Zehnder modulator is reported for the first time. First, the properties of frequency combs generated by silicon modulators are assessed in terms of tunability, coherence, and ... -
Integrated Polarization Beam Splitter for 100/400 GE Polarization Multiplexed Coherent Optical Communications
Pérez-Galacho, Diego; Zhang, Ruiyong; Ortega-Moñux, Alejandro; Halir, Robert; Alonso-Ramos, Carlos A.; Runge, Patrick; Janiak, Klemens; Zhou, Gan; Bach, Heinz-Gunter; Steffan, Andreas G.; Molina-Fernández, Íñigo[et al.] (IEEE, 2013-12-04)Monolithically integrated polarization management is a key objective for the next generation of high speed optical co- herent receivers, and will enable transmission rates up to 400 Gbps. In this work we present a ... -
Integrated polarization beam splitter with relaxed fabrication tolerances
Pérez-Galacho, Diego; Halir, Robert; Ortega-Moñux, Alejandro; Alonso-Ramos, Carlos A.; Zhang, R.; Runge, Patrick; Janiak, Klemens; Bach, Heinz-Gunter; Steffan, Andreas G.; Molina-Fernández, Íñigo[et al.] (Optical Publishing Group, 2013-06-06)Polarization handling is a key requirement for the next generation of photonic integrated circuits (PICs). Integrated polarization beam splitters (PBS) are central elements for polarization management, but their use in ... -
Optical pump-rejection filter based on silicon sub-wavelength engineered photonic structures
Pérez-Galacho, Diego; Alonso-Ramos, Carlos; Mazeas, Florent; Le Roux, Xavier; Oser, Dorian; Zhang, Weiwei; Marris-Morini, Delphine; Labonté, Laurent; Tanzilli, Sébastien; Cassan, Éric; Vivien, Laurent[et al.] (Optical Publishing Group, 2017-04-04)The high index contrast of the silicon-on-insulator (SOI) platform allows the realization of ultra-compact photonic circuits. However, this high contrast hinders the implementation of narrow-band Bragg filters. These ... -
Silicon subwavelength modal Bragg grating filters with narrow bandwidth and high optical rejection
Oser, Dorian; Pérez-Galacho, Diego; Le Roux, Xavier; Tanzilli, Sébastien; Vivien, Laurent; Labonté, Laurent; Cassan, Éric; Alonso-Ramos, Carlos[et al.] (Optical Publishing Group, 2020-10-13)Waveguide Bragg grating filters with narrow bandwidth and high optical rejection are key func- tions for several advanced silicon photonics circuits. Here, we propose and demonstrate a new Bragg grating geometry that ... -
Subwavelength engineering and asymmetry: two efficient tools for sub-nanometer-bandwidth silicon Bragg filters
Oser, Dorian; Pérez-Galacho, Diego; Alonso-Ramos, Carlos; Le Roux, Xavier; Tanzilli, Sébastien; Vivien, Laurent; Labonté, Laurent; Cassan, Éric[et al.] (Optical Publishing Group, 2018-07-02)Bragg filters stand as a key building blocks of the silicon- on-insulator (SOI) photonics platform, allowing the implementation of advanced on-chip signal manipulation. However, achieving narrowband Bragg filters with ...