The Experts below are selected from a list of 111996 Experts worldwide ranked by ideXlab platform
Kerry J Vahala - One of the best experts on this subject based on the ideXlab platform.
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New directions for optical Frequency Division: Soliton microcombs and electro-optical-modulation
2016 IEEE International Frequency Control Symposium (IFCS), 2016Co-Authors: Kerry J VahalaAbstract:Optical Frequency Division based on mode-locked laser Frequency combs makes possible the coherent transfer of Frequency stability from optical systems to electronics. It has enabled a revolution in time keeping and Frequency metrology. In this paper we describe progress on new methods for Frequency comb generation including whispering-gallery-based microcombs and electro-optical comb generation. Demonstration of optical Frequency Division to produce stable microwaves using these new approaches will be discussed.
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Electro-optical Frequency Division and stable microwave synthesis
Nonlinear Optics, 2015Co-Authors: Hansuek Lee, Scott A Diddams, Kerry J VahalaAbstract:A new method of optical Frequency Division is demonstrated using a tunable electrical oscillator to create combs through phase modulation of a dual Brillouin laser Frequency reference. The method is used to generate stable microwaves.
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electro optical Frequency Division and stable microwave synthesis
Science, 2014Co-Authors: Hansuek Lee, Scott A Diddams, Kerry J VahalaAbstract:Optical Frequency Division by using Frequency combs has revolutionized time keeping and the generation of stable microwave signals. We demonstrate optical Frequency Division and microwave generation by using a tunable electrical oscillator to create dual combs through phase modulation of two optical signals that have a stable difference Frequency. Phase-locked control of the electrical oscillator by means of optical Frequency Division produces stable microwaves. Our approach transposes the oscillator and Frequency reference of a conventional microwave Frequency synthesizer. In this way, the oscillator experiences large phase noise reduction relative to the Frequency reference. The electro-optical approach additionally relaxes the need for highly linear photodetection of the comb mode spacing. As well as simplicity, the technique is also tunable and scalable to higher Division ratios.
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Electro-optical Frequency Division and stable microwave synthesis
Science, 2014Co-Authors: Hansuek Lee, Scott A Diddams, Kerry J VahalaAbstract:Optical Frequency Division and stable microwave generation is demonstrated using an electro-optical-based Frequency comb created through phase modulation of two stable optical signals. The technique is simple, tunable and scalable to higher Division ratios.
Hansuek Lee - One of the best experts on this subject based on the ideXlab platform.
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Electro-optical Frequency Division and stable microwave synthesis
Nonlinear Optics, 2015Co-Authors: Hansuek Lee, Scott A Diddams, Kerry J VahalaAbstract:A new method of optical Frequency Division is demonstrated using a tunable electrical oscillator to create combs through phase modulation of a dual Brillouin laser Frequency reference. The method is used to generate stable microwaves.
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electro optical Frequency Division and stable microwave synthesis
Science, 2014Co-Authors: Hansuek Lee, Scott A Diddams, Kerry J VahalaAbstract:Optical Frequency Division by using Frequency combs has revolutionized time keeping and the generation of stable microwave signals. We demonstrate optical Frequency Division and microwave generation by using a tunable electrical oscillator to create dual combs through phase modulation of two optical signals that have a stable difference Frequency. Phase-locked control of the electrical oscillator by means of optical Frequency Division produces stable microwaves. Our approach transposes the oscillator and Frequency reference of a conventional microwave Frequency synthesizer. In this way, the oscillator experiences large phase noise reduction relative to the Frequency reference. The electro-optical approach additionally relaxes the need for highly linear photodetection of the comb mode spacing. As well as simplicity, the technique is also tunable and scalable to higher Division ratios.
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Electro-optical Frequency Division and stable microwave synthesis
Science, 2014Co-Authors: Hansuek Lee, Scott A Diddams, Kerry J VahalaAbstract:Optical Frequency Division and stable microwave generation is demonstrated using an electro-optical-based Frequency comb created through phase modulation of two stable optical signals. The technique is simple, tunable and scalable to higher Division ratios.
Scott A Diddams - One of the best experts on this subject based on the ideXlab platform.
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Electro-optical Frequency Division and stable microwave synthesis
Nonlinear Optics, 2015Co-Authors: Hansuek Lee, Scott A Diddams, Kerry J VahalaAbstract:A new method of optical Frequency Division is demonstrated using a tunable electrical oscillator to create combs through phase modulation of a dual Brillouin laser Frequency reference. The method is used to generate stable microwaves.
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electro optical Frequency Division and stable microwave synthesis
Science, 2014Co-Authors: Hansuek Lee, Scott A Diddams, Kerry J VahalaAbstract:Optical Frequency Division by using Frequency combs has revolutionized time keeping and the generation of stable microwave signals. We demonstrate optical Frequency Division and microwave generation by using a tunable electrical oscillator to create dual combs through phase modulation of two optical signals that have a stable difference Frequency. Phase-locked control of the electrical oscillator by means of optical Frequency Division produces stable microwaves. Our approach transposes the oscillator and Frequency reference of a conventional microwave Frequency synthesizer. In this way, the oscillator experiences large phase noise reduction relative to the Frequency reference. The electro-optical approach additionally relaxes the need for highly linear photodetection of the comb mode spacing. As well as simplicity, the technique is also tunable and scalable to higher Division ratios.
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Electro-optical Frequency Division and stable microwave synthesis
Science, 2014Co-Authors: Hansuek Lee, Scott A Diddams, Kerry J VahalaAbstract:Optical Frequency Division and stable microwave generation is demonstrated using an electro-optical-based Frequency comb created through phase modulation of two stable optical signals. The technique is simple, tunable and scalable to higher Division ratios.
Xiaoguang Zhang - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear-Frequency-packing nonlinear Frequency Division multiplexing transmission.
Optics Express, 2020Co-Authors: Xulun Zhang, Peng Sun, Zibo Zheng, Jiacheng Wei, Xiaoguang ZhangAbstract:A nonlinear Frequency Division multiplexing (NFDM) transmission system, designed specifically for nonlinear fiber channel, has the potential to overcome the nonlinear Shannon capacity limit. However, the spectral efficiency (SE) of the current proven NFDM transmission systems is still lower than that of the analogous orthogonal Frequency Division multiplexing system. It is extremely necessary to explore effective modulation scheme for the aim of increasing the SE of NFDM system. In this study, we first propose the nonlinear-Frequency-packing nonlinear Frequency Division multiplexing (NFP-NFDM) transmission system. In NFP-NFDM, the spacing of nonlinear subcarriers is squeezed and more nonlinear subcarriers can be packed, but the inter carrier interference (ICI) is introduced. The method of NFP in nonlinear Fourier domain is carefully designed to reduce the complexity of ICI cancellation. Through numerical simulation, we illustrate the feasibility of NFP-NFDM transmission, and higher SE in NFP-NFDM than that of NFDM system is also demonstrated. The upper bound of the normalized SE for NFP-NFDM is estimated, which is higher than that of current NFDM system. Besides, we find out that the NFP scheme may have the advantage of reducing the signal-noise interaction in fiber transmission scenario, which indicates there may be a better way to load the data into the nonlinear Fourier domain.
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Faster-than-Nyquist Nonlinear Frequency Division Multiplexing System
arXiv: Signal Processing, 2019Co-Authors: Xulun Zhang, Peng Sun, Zibo Zheng, Jiacheng Wei, Xiaoguang ZhangAbstract:The faster-than-Nyquist nonlinear Frequency Division multiplexing system was first proposed, which provided 12.5% and 25% increase in spectral efficiency for the compression factor of 0.89 and 0.8 respectively.
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Phase Noise Estimation for Nonlinear Frequency Division Multiplexing System
2019 18th International Conference on Optical Communications and Networks (ICOCN), 2019Co-Authors: Xulun Zhang, Zibo Zheng, Xiaoguang ZhangAbstract:For nonlinear Frequency Division multiplexing system, a transmission model in the presence of phase noise was derived, and a blind phase noise estimation method based on decision directed free technology was exploited and verified.
Thomas R. Clark - One of the best experts on this subject based on the ideXlab platform.
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Phase noise reduction of photonic Frequency synthesizer by Frequency Division
IEEE Photonic Society 24th Annual Meeting, 2011Co-Authors: Eric J. Adles, Patrick T. Callahan, Adil M. Karim, Michael L. Dennis, Thomas R. ClarkAbstract:A Frequency-independent low-phase-noise microwave source is demonstrated via Frequency Division of a photonic Frequency sythesizer.