The Experts below are selected from a list of 1290 Experts worldwide ranked by ideXlab platform
A H Gnauck - One of the best experts on this subject based on the ideXlab platform.
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an 8 10 gb s 42 km high split twdm pon featuring Distributed Raman Amplification and a remotely powered intelligent splitter
Journal of Lightwave Technology, 2017Co-Authors: P P Iannone, A H Gnauck, Michael Straub, Jorg Hehmann, Lothar Jentsch, Thomas Pfeiffer, M P EarnshawAbstract:We demonstrate an intelligent symmetric-rate 8- × 10-Gb/s bidirectional time and wavelength-division multiplexed passive optical network with 42-km reach and 1:256 split 1425-nm laser pump light provides Distributed Raman Amplification for the upstream channels (allowing low-cost low-power transmitters), serves as a low-rate telemetry channel, and powers an intelligent splitter module that provides supervision for mission-critical services
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Distributed Raman Amplification in a 8 x 10 gb s 40 km 1 128 twdm pon
Optics Express, 2016Co-Authors: Patrick P. Iannone, A H GnauckAbstract:We demonstrate Distributed Raman Amplification compatible with the wavelength plans and rates defined in ITU’s specification for TWDM PON. We report downstream and upstream gains of 9.8 dB and 8.6dB, respectively, for a 42-km, 8-wavelength TWDM PON with 80-Gb/s symmetric capacity and 1:128 split. Raman gain and system performance are also reported for 21-km and 10-km feeder lengths.
Hiroji Masuda - One of the best experts on this subject based on the ideXlab platform.
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Cross-talk characteristics of a hybrid multi-core fiber transmission system using Distributed Raman Amplification
2013 18th OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching, 2013Co-Authors: Kokoro Kitamura, K. Tayama, Hiroji MasudaAbstract:We proposed a novel hybrid multi-core fiber transmission system using Distributed Raman Amplification. Cross-talk characteristics of the system were theoretically clarified. The cross-talk of a core increased with the Raman gain of the adjacent core.
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Impacts of Distributed Raman Amplification transmission technologies on terrestrial large‐capacity WDM systems
Electronics and Communications in Japan (Part I: Communications), 2007Co-Authors: Hiroji Masuda, Masahito Tomizawa, Yutaka Miyamoto, K HagimotoAbstract:The impact of Distributed Raman Amplification (DRA) technologies on long-distance large-capacity transmission systems is discussed from the viewpoint of improving the signal-to-noise ratio (SNR). First, we show the characteristics of this technology, which has brought significant improvement to the SNR, and its trends, the basic configuration for our proposed DRA system (a DRA/EDFA hybrid configuration), and safety aspects for high-power pumped light. In addition, we show the merits of the DRA system, including the amount of improvement in the optical SNR, transmission fiber (DSF and SMF) dependence, and superiority of DSF over SMF (about 2 to 3 dB). Furthermore, in a long-distance large-capacity wavelength division multiplexing transmission field trial using DRA in the L band on DSF, we confirm good transmission characteristics. In other words, the impact of DRA technologies lies in the significant improvement of the SNR in terrestrial long-distance large-capacity optically amplified transmission systems with field-installed fibers, and in the improvement of performance in systems utilizing these technologies. © 2007 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 90(6): 20–28, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.20340
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An SNR Enhanced Transmission System over DSF Using Extended L-band EDFAs and Bidirectional Distributed Raman Amplification
Optical Amplifiers and Their Applications Coherent Optical Technologies and Applications, 2006Co-Authors: Hiroji Masuda, Yutaka MiyamotoAbstract:A novel SNR-enhanced transmission system over DSF that uses phosphorous co-doped silicate EDFAs and bidirectional Distributed Raman Amplification is proposed; it achieves 3-dB SNR enhancement for signal wavelengths from 1573 to 1620 nm.
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OSNR enhancement using a novel pump-wavelength detuning scheme for forward-pumped Distributed Raman Amplification in a 40 Gb/s-based WDM in-line amplifier transmission system
2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference, 2006Co-Authors: Kotanigawa Takashi, Hiroji Masuda, Matsuda Toshiya, S. MatsuokaAbstract:OSNR enhancement by using a novel pump-wave length detuning scheme for forward-pumped Distributed Raman Amplification in a 40 Gb/s-based L-band WDM in-line amplifier transmission system is experimentally verified for the first time.
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Advanced transmission systems using Distributed Raman Amplification technologies
Optical Transmission Systems and Equipment for WDM Networking IV, 2005Co-Authors: Hiroji MasudaAbstract:This paper introduces practical and high-performance transmission systems that employ Distributed Raman Amplification (DRA) technologies. The systems incorporate DRA/EDFA hybrid amplifiers as inline amplifiers with limited DRA pump powers. These powers are determined with respect to the practical safety and reliability of the systems against intense pump light. The practical aspects and merits of our systems are described both in detail and qualitatively. It is shown that a hybrid amplifier system using DSF performs better than one using SMF with limited pump powers. The use of DRA means that the optical SNR of the former system is typically about 2-3 dB higher than that of the latter. Moreover, this paper reports successful results of long-haul transmission field trials using the hybrid amplifier scheme in the L-band over installed DSF with an aggregate capacity of 1.28 Tbit/s (32 x 43 Gbit/s).
H. Suzuki - One of the best experts on this subject based on the ideXlab platform.
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1 tb s 100 x 10 gb s super dense wdm transmission with 25 ghz channel spacing in the zero dispersion region employing Distributed Raman Amplification technology
IEEE Photonics Technology Letters, 2000Co-Authors: H. Suzuki, H Masuda, N. Takachio, K. Iwatsuki, Junichi Kani, Y Tada, M SumidaAbstract:We achieve 1 Tb/s (100/spl times/10 Gb/s) super-dense WDM (super DWDM) transmission with 25-GHz channel spacing (0.4 bit/s/Hz spectral efficiency) in the zero-dispersion region over a 4/spl times/80 km dispersion-shifted fiber by employing backward pumped Distributed Raman Amplification and forward error correction. By adopting bi-directional pumping, we present experimental results showing that the transmission distance is extended approximately threefold to 1040 km.
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Scale expansion of transparent photonic transport network based on Distributed Raman Amplification
IEEE Photonics Technology Letters, 2000Co-Authors: T. Watanabe, F. Kano, S. Kuwano, H. Suzuki, M. KogaAbstract:We examine the impact of Distributed Raman Amplification (DRA) on the cascadability of transparent photonic transport system nodes and reveal its advantage in terms of amplified spontaneous emission noise. A 10 Gb/s/spl times/16 channel recirculating loop experiment with DRA demonstrates that a transparent network over 610 km (8 nodes) can be constructed even for a relatively large node loss of 20 dB.
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1-Tb/s (100 x 10 Gb/s) super-dense WDM transmission with 25-GHz channel spacing in the zero-dispersion region employing Distributed Raman Amplification technology
IEEE Photonics Technology Letters, 2000Co-Authors: H. Suzuki, Hiroji Masuda, N. Takachio, K. Iwatsuki, Junichi Kani, Y Tada, M SumidaAbstract:We achieve 1 Tb/s (100/spl times/10 Gb/s) super-dense WDM (super DWDM) transmission with 25-GHz channel spacing (0.4 bit/s/Hz spectral efficiency) in the zero-dispersion region over a 4/spl times/80 km dispersion-shifted fiber by employing backward pumped Distributed Raman Amplification and forward error correction. By adopting bi-directional pumping, we present experimental results showing that the transmission distance is extended approximately threefold to 1040 km.
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50 ghz spaced 32 spl times 10 gbit s dense wdm transmission in zero dispersion region over 640 km of dispersion shifted fibre with multiwavelength Distributed Raman Amplification
Electronics Letters, 1999Co-Authors: H. Suzuki, H Masuda, N. Takachio, M. KogaAbstract:The authors present, for the first time, 32/spl times/10 Gbit/s transmission (50 GHz channel spacing) in the zero-dispersion region of dispersion-shifted fibre (DSF) by employing multiwavelength Distributed Raman Amplification. Each transmission span is bi-directionally pumped at two wavelengths, 1450 and 1465 nm, to construct a wideband Distributed Raman amplifier. A hybrid amplifier formed by a gain-flattened erbium-doped fibre amplifier and a gain-flattened Distributed Raman amplifier is used to successfully realise dense WDM transmission in the zero-dispersion region over 8/spl times/80 km of DSF.
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32 spl times 10 gb s Distributed Raman Amplification transmission with 50 ghz channel spacing in the zero dispersion region over 640 km of 1 55 spl mu m dispersion shifted fiber
Optical Fiber Communication Conference, 1999Co-Authors: N. Takachio, H Masuda, H. Suzuki, M. KogaAbstract:50-GHz-spaced, 32-channel, 10-Gb/s transmission in the zero-dispersion region over 80/spl times/80 km of 1.55-/spl mu/m dispersion-shifted fiber was successfully conducted by employing Distributed Raman Amplification. This paper demonstrates a feasibility of dense WDM systems in zero-dispersion region.
Sergei K Turitsyn - One of the best experts on this subject based on the ideXlab platform.
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Mitigating RIN-penalty to enhance the transmission performance in Distributed Raman Amplification system
2017 Opto-Electronics and Communications Conference (OECC) and Photonics Global Conference (PGC), 2017Co-Authors: Mingming Tan, Sergei K Turitsyn, Asif Iqbal, Paul HarperAbstract:The paper reviews three different technologies to mitigate the relative intensity noise (RIN) penalty in Distributed Raman Amplification system. We demonstrate the performance improvement in long-haul repeatered transmission systems, thanks to the signal RIN reduction.
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Nonlinear Inverse Synthesis for Optical Links With Distributed Raman Amplification
Journal of Lightwave Technology, 2016Co-Authors: Son Thai Le, Jaroslaw E Prilepsky, J D Ania-Casta��n, P. Di Rosa, Sergei K TuritsynAbstract:Nonlinear Fourier transform (NFT) and eigenvalue communication with the use of nonlinear signal spectrum (both discrete and continuous) have been recently discussed as a promising transmission method to combat fiber nonlinearity impairments. However, because the NFT-based transmission method employs the integrability property of the lossless nonlinear Schro?dinger equation (NLSE), the original approach can only be applied directly to optical links with ideal Distributed Raman Amplification. In this paper, we investigate in details the impact of a non-ideal Raman gain profile on the performance of the nonlinear inverse synthesis (NIS) scheme, in which the transmitted information is encoded directly onto the continuous part of the nonlinear signal spectrum. We propose the lossless path-averaged (LPA) model for fiber links with non-ideal Raman gain profile by taking into account the average effect of the Raman gain. We show that the NIS scheme employing the LPA model can offer a performance gain of 3 dB regardless of the Raman gain profiles.
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Modified nonlinear inverse synthesis for optical links with Distributed Raman Amplification
2015 European Conference on Optical Communication (ECOC), 2015Co-Authors: Jaroslaw E Prilepsky, P. Di Rosa, Juan Diego Ania-castanon, Mingming Tan, Morteza Kamalian, Paul Harper, Sergei K TuritsynAbstract:We propose a modification of the nonlinear digital signal processing technique based on the nonlinear inverse synthesis for the systems with Distributed Raman Amplification. The proposed path-average approach offers 3 dB performance gain, regardless of the signal power profile.
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Distributed Raman Amplification speeds communication
Laser Focus World, 2006Co-Authors: Juan Diego Ania-castanon, Sergei K Turitsyn, Stanislav ChernikovAbstract:A key technology for future long-distance, high-capacity terrestrial optical communication links, Distributed Raman Amplification can increase system performance and expand the range of operating wavelengths.
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“Magic” Dispersion Maps with Distributed Raman Amplification
Theoretical and Mathematical Physics, 2003Co-Authors: S. Boscolo, Sergei K Turitsyn, Juan Diego Ania-castanon, K. J. BlowAbstract:We analyze pulse propagation in an optical fiber with a periodic dispersion map and Distributed Amplification. Using an asymptotic theory and a momentum method, we identify a family of dispersion management schemes that are advantageous for massive multichannel soliton transmission. For the case of two-step dispersion maps with Distributed Raman Amplification to compensate for the fiber loss, we find special schemes that have optimal (chirp-free) launch point locations that are independent of the fiber dispersion. Despite the variation of dispersion with wavelength due to the fiber dispersion slope, the transmission in several different channels can be optimized simultaneously using the same optimal launch point. The theoretical predictions are verified by direct numerical simulations. The obtained results are applied to a practical multichannel transmission system.
P. Di Rosa - One of the best experts on this subject based on the ideXlab platform.
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Unrepeatered 240-km 64-QAM transmission using Distributed Raman Amplification over SMF fiber
Applied Sciences, 2020Co-Authors: P. Di Rosa, Mingming Tan, Giuseppe Rizzelli, Xiaodan Pang, Oskars Ozolins, Aleksejs Udalcovs, Marek Jaworski, Marian Marciniak, Sergey Sergeyev, Richard SchatzAbstract:We present a theoretical and experimental investigation of unrepeatered transmission over standard single-mode fiber (SMF-28) using several schemes of Distributed Raman Amplification, including fir ...
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Nonlinear Inverse Synthesis for Optical Links With Distributed Raman Amplification
Journal of Lightwave Technology, 2016Co-Authors: Son Thai Le, Jaroslaw E Prilepsky, J D Ania-Casta��n, P. Di Rosa, Sergei K TuritsynAbstract:Nonlinear Fourier transform (NFT) and eigenvalue communication with the use of nonlinear signal spectrum (both discrete and continuous) have been recently discussed as a promising transmission method to combat fiber nonlinearity impairments. However, because the NFT-based transmission method employs the integrability property of the lossless nonlinear Schro?dinger equation (NLSE), the original approach can only be applied directly to optical links with ideal Distributed Raman Amplification. In this paper, we investigate in details the impact of a non-ideal Raman gain profile on the performance of the nonlinear inverse synthesis (NIS) scheme, in which the transmitted information is encoded directly onto the continuous part of the nonlinear signal spectrum. We propose the lossless path-averaged (LPA) model for fiber links with non-ideal Raman gain profile by taking into account the average effect of the Raman gain. We show that the NIS scheme employing the LPA model can offer a performance gain of 3 dB regardless of the Raman gain profiles.
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The role of Distributed Raman Amplification in the times of the “capacity crunch”
2016 18th International Conference on Transparent Optical Networks (ICTON), 2016Co-Authors: Juan Diego Ania-castanon, P. Di Rosa, Giuseppe Rizzelli, Francesca Gallazzi, Javier Nuño, Pedro CorrederaAbstract:Distributed Raman Amplification has different roles to play in combination with of a range of potential solutions to deal with the nonlinear Shannon limit. Here, we will cover issues such as asymmetry optimisation for optical-phase conjugation nonlinear compensation, the combination of optimised Distributed Amplification with digital nonlinear compensation techniques and the challenges of adopting high-spectral density formats while still making use of all the possible available bandwidth. Some examples are drawn from recent results from the past few years.
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Modified nonlinear inverse synthesis for optical links with Distributed Raman Amplification
2015 European Conference on Optical Communication (ECOC), 2015Co-Authors: Jaroslaw E Prilepsky, P. Di Rosa, Juan Diego Ania-castanon, Mingming Tan, Morteza Kamalian, Paul Harper, Sergei K TuritsynAbstract:We propose a modification of the nonlinear digital signal processing technique based on the nonlinear inverse synthesis for the systems with Distributed Raman Amplification. The proposed path-average approach offers 3 dB performance gain, regardless of the signal power profile.