The Experts below are selected from a list of 18942 Experts worldwide ranked by ideXlab platform
Antonella Bogoni - One of the best experts on this subject based on the ideXlab platform.
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Optical digital signal processing in a single soa without assist probe light
IEEE Journal on Selected Topics in Quantum Electronics, 2010Co-Authors: Claudio Porzi, Mirco Scaffardi, L. Poti, Antonella BogoniAbstract:By exploiting nonlinear effects in a single semiconductor optical amplifier, different functionalities for all-optical digital signal processing applications are implemented. In particular, we demonstrate all-optical exclusive-OR (XOR) logical operation and all-optical binary-to-quaternary ASK format Conversion suitable for 2-bit all-optical digital-to-Analog Conversion (DAC). Both operations are performed without the use of any extra probe light beam. Beside the advantage of reduced complexity in terms of number of active elements the proposed architecture allows to preserve the input signal wavelength at the gate output and is suitable for photonic integration. Error-free operation at 10 Gb/s is demonstrated for the all-optical XOR gate, whereas correct dynamic operation, always at 10 Gb/s is observed for the binary-to-quaternary ASK format converter. Based on the proposed single semiconductor optical amplifier architecture a possible implementation of 3-bit DAC scheme with reduced number of active gates with respect to previously reported schemes is also presented.
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binary to quaternary ask encoding in the optical domain with semiconductor optical amplifiers
IEEE Photonics Technology Letters, 2009Co-Authors: Claudio Porzi, L. Poti, An T Nguyen, Antonella BogoniAbstract:Quaternary amplitude-shift-keying signal is all-optically generated from binary signals exploiting gain compression in two semiconductor optical amplifiers. The scheme is suitable for phase-control-free all-optical digital-to-Analog Conversion. Only two semiconductor amplifiers, a single optical filter, and no assist probe light are required for 2-bit operation. In addition, the input wavelength is preserved at the output of the device. Dynamic operation is experimentally demonstrated. The quality of the level-converted signal is confirmed by the high Q -factor of the output eye diagrams.
Kohroh Kobayashi - One of the best experts on this subject based on the ideXlab platform.
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demonstration of an optical label switch using an optical digital to Analog Conversion type label processor with a self gate pulse generator and a power equalizer
IEEE Photonics Technology Letters, 2006Co-Authors: Hiroyuki Uenohara, S Shimizu, Kohroh KobayashiAbstract:An optical label switch using an optical digital-to-Analog Conversion-type label processor with self-gate-pulse generation and power equalization was achieved. Indispensable operations such as start-bit detection and power equalization were realized by recognizing the first-bit power difference and an optical-electrical-optical-type regenerator, respectively. The input dynamic ranges of 3.0 and 7.5 dB were achieved for gate-pulse generation and power equalization, and the resultant label recognition with 3.0-dB input dynamic range with both functions was obtained. An optical label switch performance with these function blocks were realized.
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investigation of high speed wavelength routing and bit error rate performance of an optical packet switch with an optical digital to Analog Conversion based header processor
IEEE Photonics Technology Letters, 2004Co-Authors: Hiroyuki Uenohara, T Seki, Kohroh KobayashiAbstract:Wavelength routing and bit-error-rate (BER) performance of an optical packet switch called a wavelength label switch consisting of an optical digital-to-Analog Conversion-based header processor, wavelength selection portion with an electrically tunable laser, a wavelength converter based on a semiconductor optical amplifier, and wavelength routing by use of an arrayed waveguide grating was realized. Wavelength selection for an electrically tunable laser was successfully achieved within a few tens of nanoseconds by using 2-b optical header processor and a field programmable gate array-based wavelength table. High-speed transfer performance of less than a few tens of nanoseconds and BER of less than 10/sup -10/ were verified in wavelength routing operation between three assigned wavelength.
Hansandrea Loeliger - One of the best experts on this subject based on the ideXlab platform.
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binary control and digital to Analog Conversion using composite nuv priors and iterative gaussian message passing
International Conference on Acoustics Speech and Signal Processing, 2021Co-Authors: Raphael Keusch, Hampus Malmberg, Hansandrea LoeligerAbstract:The paper proposes a new method to determine a binary control signal for an Analog linear system such that the state, or some output, of the system follows a given target trajectory. The method can also be used for digital-to-Analog Conversion.The heart of the proposed method is a new binary-enforcing NUV prior (normal with unknown variance). The resulting computations, for each planning period, amount to iterating forward-backward Gaussian message passing recursions (similar to Kalman smoothing), with a complexity (per iteration) that is linear in the planning horizon. In consequence, the proposed method is not limited to a short planning horizon.
Claudio Porzi - One of the best experts on this subject based on the ideXlab platform.
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Optical digital signal processing in a single soa without assist probe light
IEEE Journal on Selected Topics in Quantum Electronics, 2010Co-Authors: Claudio Porzi, Mirco Scaffardi, L. Poti, Antonella BogoniAbstract:By exploiting nonlinear effects in a single semiconductor optical amplifier, different functionalities for all-optical digital signal processing applications are implemented. In particular, we demonstrate all-optical exclusive-OR (XOR) logical operation and all-optical binary-to-quaternary ASK format Conversion suitable for 2-bit all-optical digital-to-Analog Conversion (DAC). Both operations are performed without the use of any extra probe light beam. Beside the advantage of reduced complexity in terms of number of active elements the proposed architecture allows to preserve the input signal wavelength at the gate output and is suitable for photonic integration. Error-free operation at 10 Gb/s is demonstrated for the all-optical XOR gate, whereas correct dynamic operation, always at 10 Gb/s is observed for the binary-to-quaternary ASK format converter. Based on the proposed single semiconductor optical amplifier architecture a possible implementation of 3-bit DAC scheme with reduced number of active gates with respect to previously reported schemes is also presented.
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binary to quaternary ask encoding in the optical domain with semiconductor optical amplifiers
IEEE Photonics Technology Letters, 2009Co-Authors: Claudio Porzi, L. Poti, An T Nguyen, Antonella BogoniAbstract:Quaternary amplitude-shift-keying signal is all-optically generated from binary signals exploiting gain compression in two semiconductor optical amplifiers. The scheme is suitable for phase-control-free all-optical digital-to-Analog Conversion. Only two semiconductor amplifiers, a single optical filter, and no assist probe light are required for 2-bit operation. In addition, the input wavelength is preserved at the output of the device. Dynamic operation is experimentally demonstrated. The quality of the level-converted signal is confirmed by the high Q -factor of the output eye diagrams.
Akihiro Maruta - One of the best experts on this subject based on the ideXlab platform.
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all optical digital to Analog Conversion using nonlinear optical loop mirrors
IEEE Photonics Technology Letters, 2006Co-Authors: Shoichiro Oda, Akihiro MarutaAbstract:We propose a novel ultrafast all-optical digital-to-Analog Conversion (DAC) scheme consisting of nonlinear optical loop mirrors, which can be applied to both a standard binary code and a Gray code. We conducted a proof-of-principle experiment and successfully demonstrated a 2-bit all-optical DAC with a Gray code, which indicates that the proposed scheme is feasible.
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all optical Analog to digital and digital to Analog Conversions based on fiber nonlinearities
2006Co-Authors: Akihiro Maruta, Shoichiro OdaAbstract:Fiber nonlinearities provide us attractive nonlinear functions for all-optical signal processing. In this paper, we review all-optical Analog-to-digital and digital-to-Analog Conversion schemes based on fiber nonlinearities, including soliton phenomena, Supercontinuum generation, and parametric amplification.