The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Stefano Faralli - One of the best experts on this subject based on the ideXlab platform.
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Integrated Reconfigurable Silicon Photonics Switch Matrix in IRIS Project: Technological Achievements and Experimental Results
Journal of Lightwave Technology, 2019Co-Authors: Francesco Testa, Stefano Tondini, Fabrizio Gambini, Philippe Velha, Alberto Bianchi, Christophe Kopp, Michael Hofbauer, Costanza Lucia Manganelli, Nikola Zecevic, Stefano FaralliAbstract:This paper reports the performances of a silicon photonics optical switch matrix fabricated by using large-scale three-dimensional (3-D) integration. The wavelength selective optical switch consists of a photonic integrated circuit (PIC), with 1398 circuit elements, interconnected in a 3-D stack with its control electronic integrated circuit (EIC). Each PIC element can be trimmed or reconfigured by using metallic heaters. The EIC is designed to drive the heaters and to read the signal of monitor photodiodes integrated into the PIC. Small footprint and high energy efficiency are achieved in the PIC and the EIC. Automatic wavelength alignment of the optical circuits in the PIC to the ITU grid and fine temperature tuning of each photonic element to optimize the switch Insertion Losses are obtained by an optimization routine. A fully packaged switch with input/output fibers is tested both for optical and electrical characteristics as well as for the system performances. Fiber-to-fiber Insertion Losses of about 20 dB and channel isolation of -35 dB are achieved. Bit error rate characteristics at 25 Gb/s are evaluated. Perspective applications of the optical switch in optical transport and intra-data center networks are discussed.
Stefano Trillo - One of the best experts on this subject based on the ideXlab platform.
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Low Insertion Losses and high drop efficiency photonic crystal filter for advanced telecom modulation formats
2012 Conference on Lasers and Electro-Optics (CLEO), 2012Co-Authors: Kevin Lenglé, Jean Claude Simon, Gaëlle Lehoucq, Stefania Malaguti, Stefano Trillo, Laurent Bramerie, Sylvain Combrie, A. De Rossi, Gaetano BellancaAbstract:A 2D photonic crystal 3-ports filter with 6 dB bus Insertion Losses and drop efficiency of 47 % is reported. Error-free operation with low penalty (
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low Insertion Losses and high drop efficiency photonic crystal filter for advanced telecom modulation formats
Conference on Lasers and Electro-Optics, 2012Co-Authors: Kevin Lenglé, Jean Claude Simon, Gaëlle Lehoucq, Stefania Malaguti, Stefano Trillo, Laurent Bramerie, Sylvain Combrie, A. De Rossi, Gaetano BellancaAbstract:A 2D photonic crystal 3-ports filter with 6 dB bus Insertion Losses and drop efficiency of 47 % is reported. Error-free operation with low penalty (<0.5 dB) for OOK and DQPSK modulation formats is demonstrated.
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Wavelength Division Demultiplexing and Crosstalk Assessment of a Photonic Crystal Filter
IEEE Photonics Technology Letters, 2012Co-Authors: Kevin Lenglé, Jean Claude Simon, Gaëlle Lehoucq, Alfredo De Rossi, Stefania Malaguti, Laurent Bramerie, Sylvain Combrie, Gaetano Bellanca, Stefano TrilloAbstract:We report on the design, fabrication, and characterization of a filter for demultiplexing in the wavelength division domain achieved with a H0 cavity on a III-V photonic crystal (PhC) membrane. This device is single mode, the total Insertion Losses are about 10.5 dB, the drop efficiency is close to 40%, and the channel isolation can exceed 20 dB at 500 GHz. A 28-Gb/s nonreturn to zero (NRZ) wavelength demultiplexing shows
Michel Lequime - One of the best experts on this subject based on the ideXlab platform.
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Substrate-strain-induced tunability of dense wavelength-division multiplexing thin-film filters.
Optics letters, 2003Co-Authors: Rémy Parmentier, Michel LequimeAbstract:Classic dense wavelength-division multiplexing thin-film filters can be spectrally tuned through the substrate's strain. We analyze the theoretical shift of the design wavelength of a narrow-bandpass filter when uniform, uniaxial compressive stress is applied to the substrate, and we compare calculated sensitivity with experimental data. We measure the transmittance shape of a 200-GHz standard filter for several loading cases to quantify the increase of Insertion Losses.
Alfredo De Rossi - One of the best experts on this subject based on the ideXlab platform.
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Wavelength Division Demultiplexing and Crosstalk Assessment of a Photonic Crystal Filter
IEEE Photonics Technology Letters, 2012Co-Authors: Kevin Lenglé, Jean Claude Simon, Gaëlle Lehoucq, Alfredo De Rossi, Stefania Malaguti, Laurent Bramerie, Sylvain Combrie, Gaetano Bellanca, Stefano TrilloAbstract:We report on the design, fabrication, and characterization of a filter for demultiplexing in the wavelength division domain achieved with a H0 cavity on a III-V photonic crystal (PhC) membrane. This device is single mode, the total Insertion Losses are about 10.5 dB, the drop efficiency is close to 40%, and the channel isolation can exceed 20 dB at 500 GHz. A 28-Gb/s nonreturn to zero (NRZ) wavelength demultiplexing shows
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Photonic crystal membrane waveguides with low Insertion Losses
Applied Physics Letters, 2009Co-Authors: Quynh Vy Tran, Sylvain Combrí, Pierre Colman, Alfredo De RossiAbstract:We demonstrate experimentally that the fiber to fiber total Insertion loss into a single-mode waveguide in a suspended photonic crystal membrane can be reduced to less than 10 dB (input, output, and propagation) without introducing any supplementary processing step (e.g., polymer deposition and etching). This is achieved through a suitable design of the waveguide end-facets minimizing the impedance mismatch and thereby the residual reflectance at the waveguide ends.
Francesco Testa - One of the best experts on this subject based on the ideXlab platform.
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Integrated Reconfigurable Silicon Photonics Switch Matrix in IRIS Project: Technological Achievements and Experimental Results
Journal of Lightwave Technology, 2019Co-Authors: Francesco Testa, Stefano Tondini, Fabrizio Gambini, Philippe Velha, Alberto Bianchi, Christophe Kopp, Michael Hofbauer, Costanza Lucia Manganelli, Nikola Zecevic, Stefano FaralliAbstract:This paper reports the performances of a silicon photonics optical switch matrix fabricated by using large-scale three-dimensional (3-D) integration. The wavelength selective optical switch consists of a photonic integrated circuit (PIC), with 1398 circuit elements, interconnected in a 3-D stack with its control electronic integrated circuit (EIC). Each PIC element can be trimmed or reconfigured by using metallic heaters. The EIC is designed to drive the heaters and to read the signal of monitor photodiodes integrated into the PIC. Small footprint and high energy efficiency are achieved in the PIC and the EIC. Automatic wavelength alignment of the optical circuits in the PIC to the ITU grid and fine temperature tuning of each photonic element to optimize the switch Insertion Losses are obtained by an optimization routine. A fully packaged switch with input/output fibers is tested both for optical and electrical characteristics as well as for the system performances. Fiber-to-fiber Insertion Losses of about 20 dB and channel isolation of -35 dB are achieved. Bit error rate characteristics at 25 Gb/s are evaluated. Perspective applications of the optical switch in optical transport and intra-data center networks are discussed.