The Experts below are selected from a list of 17769 Experts worldwide ranked by ideXlab platform
Boris A. Malomed - One of the best experts on this subject based on the ideXlab platform.
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Stable nonlinear amplification of solitons without Gain Saturation
EPL (Europhysics Letters), 2012Co-Authors: Olga V. Borovkova, Valery E. Lobanov, Boris A. MalomedAbstract:We demonstrate that the cubic Gain applied in a localized region, which is embedded into a bulk waveguide with the cubic-quintic nonlinearity and uniform linear losses, supports stable spatial solitons in the absence of the quintic dissipation. The system, featuring the bistability between the solitons and zero state (which are separated by a family of unstable solitons), may be used as a nonlinear amplifier for optical and plasmonic solitons, which, on the contrary to previously known settings, does not require Gain Saturation. The results are obtained in an analytical form and corroborated by the numerical analysis.
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stable nonlinear amplification of solitons without Gain Saturation
EPL, 2012Co-Authors: Olga V. Borovkova, Valery E. Lobanov, Boris A. MalomedAbstract:We demonstrate that the cubic Gain applied in a localized region, which is embedded into a bulk waveguide with the cubic-quintic nonlinearity and uniform linear losses, supports stable spatial solitons in the absence of the quintic dissipation. The system, featuring the bistability between the solitons and the zero state (which are separated by a family of unstable solitons), may be used as a nonlinear amplifier for optical and plasmonic solitons, which, on the contrary to previously known settings, does not require Gain Saturation. The results are obtained in an analytical form and corroborated by the numerical analysis.
D Bimberg - One of the best experts on this subject based on the ideXlab platform.
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static Gain Saturation model of quantum dot semiconductor optical amplifiers
IEEE Journal of Quantum Electronics, 2008Co-Authors: Jungho Kim, M Laemmlin, C Meuer, D Bimberg, G EisensteinAbstract:We theoretically investigate the Gain Saturation behavior of a quantum-dot (QD) semiconductor optical amplifier (SOA), focusing on spectral hole burning (SHB) and total carrier density depletion (TCDD). In the static Gain model for a QD-SOA, SHB is modeled by the quantum-mechanical density matrix theory and TCDD is described by the shift of the global quasi-Fermi level. We calculate the Gain Saturation spectra of a QD-SOA at various injection current densities and qualitatively explain how high-speed cross-Gain Saturation responses can be affected by injection current density. From the quantum-mechanical description for SHB, we show that the optical power for 3-dB Gain Saturation due to SHB is proportional to the square of the homogeneous linewidth and the functionality of a QD-SOA can be changed by controlling device parameters such as doping density and barrier potential to adjust the homogeneous linewidth.
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On Gain Saturation in quantum dot semiconductor optical amplifiers
Optics Communications, 2004Co-Authors: Alexander V. Uskov, M Laemmlin, Eoin P. O'reilly, Nikolai N. Ledentsov, D BimbergAbstract:We show for quantum dot (QD) semiconductor optical amplifiers (SOAs) operating in the regime where the Gain is maximized, that Gain Saturation due to carrier depletion can be eliminated by increasing the SOA pump current density. At high pump currents, Gain Saturation in QD SOAs is then due to spectral hole burning. As a result, the Saturation power for cw amplification can be enhanced by two orders in magnitude in QD SOAs. On the other hand, the increase of the Saturation pulse energy in single pulse amplification depends strongly on the pulse duration. For pulse durations of order 100 ps, the Saturation pulse energy can be increased by one order of magnitude, while a significantly smaller increase is expected for pulses of duration less than 10 ps. Simple approximate formulas are given for the Gain Saturation characteristics in these different regimes.
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Prevention of Gain Saturation by multi-layer quantum dot lasers
Electronics Letters, 1996Co-Authors: Oliver G. Schmidt, D Bimberg, Nikolai N. Ledentsov, N. Kirstaedter, Ming-hua Mao, V. M. Ustinov, A.y. Egorov, A. E. Zhukov, M. V. Maximov, P. S. Kop’evAbstract:The authors compare the threshold current density jt/sub h/ aGainst the laser length of a single layer quantum dot (SLQD) laser with a sixfold multilayer quantum dot (MLQD) laser. Gain Saturation is not observed in the MLQD laser. They calculate j/sub th/ aGainst the number of dot layers including Gain Saturation. The strong impact of thermal coupling of carriers on j/sub th/ is demonstrated.
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Overcoming Gain Saturation in InAs/GaAs quantum dot lasers
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society, 1Co-Authors: Oliver G. Schmidt, D Bimberg, Nikolai N. Ledentsov, N. Kirstaedter, Ming-hua Mao, V. M. Ustinov, A.y. Egorov, A. E. Zhukov, M. V. Maximov, P. S. Kop’evAbstract:By stacking multiple layers of InAs-GaAs quantum dots Gain Saturation in zero-dimensional laser structures is overcome. The effect of thermal coupling between carriers in different dots in a multi-layer structure is demonstrated.
Olga V. Borovkova - One of the best experts on this subject based on the ideXlab platform.
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Stable nonlinear amplification of solitons without Gain Saturation
EPL (Europhysics Letters), 2012Co-Authors: Olga V. Borovkova, Valery E. Lobanov, Boris A. MalomedAbstract:We demonstrate that the cubic Gain applied in a localized region, which is embedded into a bulk waveguide with the cubic-quintic nonlinearity and uniform linear losses, supports stable spatial solitons in the absence of the quintic dissipation. The system, featuring the bistability between the solitons and zero state (which are separated by a family of unstable solitons), may be used as a nonlinear amplifier for optical and plasmonic solitons, which, on the contrary to previously known settings, does not require Gain Saturation. The results are obtained in an analytical form and corroborated by the numerical analysis.
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stable nonlinear amplification of solitons without Gain Saturation
EPL, 2012Co-Authors: Olga V. Borovkova, Valery E. Lobanov, Boris A. MalomedAbstract:We demonstrate that the cubic Gain applied in a localized region, which is embedded into a bulk waveguide with the cubic-quintic nonlinearity and uniform linear losses, supports stable spatial solitons in the absence of the quintic dissipation. The system, featuring the bistability between the solitons and the zero state (which are separated by a family of unstable solitons), may be used as a nonlinear amplifier for optical and plasmonic solitons, which, on the contrary to previously known settings, does not require Gain Saturation. The results are obtained in an analytical form and corroborated by the numerical analysis.
G Eisenstein - One of the best experts on this subject based on the ideXlab platform.
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static Gain Saturation model of quantum dot semiconductor optical amplifiers
IEEE Journal of Quantum Electronics, 2008Co-Authors: Jungho Kim, M Laemmlin, C Meuer, D Bimberg, G EisensteinAbstract:We theoretically investigate the Gain Saturation behavior of a quantum-dot (QD) semiconductor optical amplifier (SOA), focusing on spectral hole burning (SHB) and total carrier density depletion (TCDD). In the static Gain model for a QD-SOA, SHB is modeled by the quantum-mechanical density matrix theory and TCDD is described by the shift of the global quasi-Fermi level. We calculate the Gain Saturation spectra of a QD-SOA at various injection current densities and qualitatively explain how high-speed cross-Gain Saturation responses can be affected by injection current density. From the quantum-mechanical description for SHB, we show that the optical power for 3-dB Gain Saturation due to SHB is proportional to the square of the homogeneous linewidth and the functionality of a QD-SOA can be changed by controlling device parameters such as doping density and barrier potential to adjust the homogeneous linewidth.
Valery E. Lobanov - One of the best experts on this subject based on the ideXlab platform.
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Stable nonlinear amplification of solitons without Gain Saturation
EPL (Europhysics Letters), 2012Co-Authors: Olga V. Borovkova, Valery E. Lobanov, Boris A. MalomedAbstract:We demonstrate that the cubic Gain applied in a localized region, which is embedded into a bulk waveguide with the cubic-quintic nonlinearity and uniform linear losses, supports stable spatial solitons in the absence of the quintic dissipation. The system, featuring the bistability between the solitons and zero state (which are separated by a family of unstable solitons), may be used as a nonlinear amplifier for optical and plasmonic solitons, which, on the contrary to previously known settings, does not require Gain Saturation. The results are obtained in an analytical form and corroborated by the numerical analysis.
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stable nonlinear amplification of solitons without Gain Saturation
EPL, 2012Co-Authors: Olga V. Borovkova, Valery E. Lobanov, Boris A. MalomedAbstract:We demonstrate that the cubic Gain applied in a localized region, which is embedded into a bulk waveguide with the cubic-quintic nonlinearity and uniform linear losses, supports stable spatial solitons in the absence of the quintic dissipation. The system, featuring the bistability between the solitons and the zero state (which are separated by a family of unstable solitons), may be used as a nonlinear amplifier for optical and plasmonic solitons, which, on the contrary to previously known settings, does not require Gain Saturation. The results are obtained in an analytical form and corroborated by the numerical analysis.
