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Fuzzy-Model-Based Finite Frequency Fault Detection Filtering Design for Two-Dimensional Nonlinear Systems
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作者 Meng Wang Huaicheng Yan +1 位作者 Jianbin Qiu Wenqiang Ji 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2024年第10期2099-2110,共12页
This article studies the fault detection filtering design problem for Roesser type two-dimensional(2-D)nonlinear systems described by uncertain 2-D Takagi-Sugeno(T-S)fuzzy models.Firstly,fuzzy Lyapunov functions are c... This article studies the fault detection filtering design problem for Roesser type two-dimensional(2-D)nonlinear systems described by uncertain 2-D Takagi-Sugeno(T-S)fuzzy models.Firstly,fuzzy Lyapunov functions are constructed and the 2-D Fourier transform is exploited,based on which a finite frequency fault detection filtering design method is proposed such that a residual signal is generated with robustness to external disturbances and sensitivity to faults.It has been shown that the utilization of available frequency spectrum information of faults and disturbances makes the proposed filtering design method more general and less conservative compared with a conventional nonfrequency based filtering design approach.Then,with the proposed evaluation function and its threshold,a novel mixed finite frequency H_(∞)/H_(-)fault detection algorithm is developed,based on which the fault can be immediately detected once the evaluation function exceeds the threshold.Finally,it is verified with simulation studies that the proposed method is effective and less conservative than conventional non-frequency and/or common Lyapunov function based filtering design methods. 展开更多
关键词 Fault diagnosis finite frequency specifications mixed H_(∞)/H_(-)performance two-dimensional nonlinear systems
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Quantum frequency down-conversion of single photons at 1552 nm from single InAs quantum dot 被引量:2
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作者 Ben Ma Si-Hang Wei +3 位作者 Ze-Sheng Chen Xiang-Jun Shang Hai-Qiao Ni Zhi-Chuan Niu 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第9期595-599,共5页
Near-infrared single photon sources in telecommunication bands, especially at 1550 nm, are required for long-distance quantum communication. Here a down-conversion quantum interface is implemented, where the single ph... Near-infrared single photon sources in telecommunication bands, especially at 1550 nm, are required for long-distance quantum communication. Here a down-conversion quantum interface is implemented, where the single photons emitted from single In As quantum dot at 864 nm is down converted to 1552 nm by using a fiber-coupled periodically poled lithium niobate(PPLN) waveguide and a 1.95 μmm pump laser, and the frequency conversion efficiency is ~40%. The singlephoton purity of quantum dot emission is preserved during the down-conversion process, i.e., g^((2))(0), only 0.22 at 1552 nm.This present technique advances the Ⅲ-Ⅴ semiconductor quantum dots as a promising platform for long-distance quantum communication. 展开更多
关键词 quantum frequency down-conversion quantum dot telecommunication band single photon
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Noise-free frequency conversion of quantum states
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作者 白云飞 翟淑琴 +1 位作者 郜江瑞 张俊香 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第3期252-256,共5页
In this paper, the frequency conversion of quantum states based on the intracavity nonlinear interaction is proposed. The fidelity of an input state after frequency conversion is calculated, and it is shown the noise-... In this paper, the frequency conversion of quantum states based on the intracavity nonlinear interaction is proposed. The fidelity of an input state after frequency conversion is calculated, and it is shown the noise-free frequency conversion of a quantum state can be achieved by injecting a strong signal field. The dependences of conversion efficiency on the pump parameter, extra losses and input state amplitude are also analysed. 展开更多
关键词 frequency conversion quantum state FIDELITY
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Quantum frequency up-conversion with a cavity
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作者 白云飞 翟淑琴 +1 位作者 郜江瑞 张俊香 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第8期237-241,共5页
The quantum state transfer from subharmonic frequency to harmonic frequency based on asymmetrically pumped second harmonic generation in a cavity is investigated theoretically. The performance of noise-free frequency ... The quantum state transfer from subharmonic frequency to harmonic frequency based on asymmetrically pumped second harmonic generation in a cavity is investigated theoretically. The performance of noise-free frequency up- conversion is evaluated by the signal transfer coefficient and the conversion efficiency, in which both the quadrature fluctuation and the average photon number are taken into consideration. It is shown that the quantum property can be preserved during frequency up-conversion via operating the cavity far below the threshold. The dependences of the transfer coefficient and the conversion efficiency on pump parameter, analysing frequency, and cavity extra loss are also discussed. 展开更多
关键词 frequency up-conversion signal transfer coefficient conversion efficiency
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Decoupled estimation of frequency-dependent IQI and channel for OFDM systems with direct-conversion transceivers 被引量:1
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作者 Yan Liang Rongfang Song +2 位作者 Fei Li Xueyun He Lihua Yang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2017年第3期435-441,共7页
The in-phase and quadrature-phase imbalance (IQI) is one of the major radio frequency impairments existing in orthogonal frequency division multiplexing (OFDM) systems with direct-conversion transceivers. During the t... The in-phase and quadrature-phase imbalance (IQI) is one of the major radio frequency impairments existing in orthogonal frequency division multiplexing (OFDM) systems with direct-conversion transceivers. During the transmission of the communication signal, the impact of IQI is coupled with channel impulse responses (CIR), which makes the traditional channel estimation schemes ineffective. A decoupled estimation scheme is proposed to separately estimate the frequency-dependent IQI and wireless channel. Firstly, the generalized channel model is built to separate the parameters of IQI and wireless channel. Then an iterative estimation scheme of frequency-dependent IQI is designed at the initial stage of communication. Finally, based on the estimation result of IQI, the least square algorithm is utilized to estimate the channel-related parameters at each time of channel variation. Compared with the joint estimation schemes of IQI and channel, the proposed decoupled estimation scheme requires much lower training overhead at each time of channel variation. Simulation results demonstrate the good estimation performance of the proposed scheme. 展开更多
关键词 direct-conversion transceivers frequency-dependent in-phase and quadrature-phase imbalance (IQI) orthogonal frequency division multiplexing (OFDM) decoupled estimation
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Frequency Up-conversion Luminescence Properties and Mechanism of Tm^(3+) /Er^(3+)/Yb^(3+) Co-doped Oxyfluorogermanate Glasses 被引量:1
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作者 胡曰博 周大利 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第3期393-397,共5页
Oxyfluoride glasses were developed with composition 60GeO 2 ·10AlF 3 ·25BaF 2 ·(1.95-x)GdF 3 · 3YbF 3 ·0.05TmF 3 ·xErF 3 (x=0.02,0.05,0.08,0.11,0.14,0.17)in mole percent.Intense blue... Oxyfluoride glasses were developed with composition 60GeO 2 ·10AlF 3 ·25BaF 2 ·(1.95-x)GdF 3 · 3YbF 3 ·0.05TmF 3 ·xErF 3 (x=0.02,0.05,0.08,0.11,0.14,0.17)in mole percent.Intense blue(476 nm),green(524 and 546 nm)and red(658 nm)emissions which identified from the 1G 4 →3H 6 transition of Tm3+and the(2H 11/2 ,4S 3/2 )→4I 15/2 ,4F 9/2 →4I 15/2 transitions of Er3+,respectively,were simultaneously observed under 980 nm excitation at room temperature.The results show that multicolor luminescence including white light can be adjustably tuned by changing doping concentrations of Er3+ion or the excitation power.In addition,the energy transfer processes among Tm3+,Er3+and Yb3+ions,and up-conversion mechanisms are discussed. 展开更多
关键词 frequency up-conversion luminescence oxyfluorogermanate glasses Tm3+/Er3+/Yb3+co- doped optical properties energy transfer
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Nonreciprocal Single Photon Frequency Conversion via Chiral Coupling between a V-Type System and a Pair of Waveguides
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作者 Ce Shi Mu-Tian Cheng +4 位作者 Xiao-San Ma Dong Wang Xianshan Huang Bing Wang Jia-Yan Zhang 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第5期34-38,共5页
The single photon frequency conversion is investigated theoretically in the system composed of a V-type system chiral coupling to a pair of waveguides. The single photon scattering amplitudes are obtained using the re... The single photon frequency conversion is investigated theoretically in the system composed of a V-type system chiral coupling to a pair of waveguides. The single photon scattering amplitudes are obtained using the real-space Hamiltonian. The calculated results show that the probability of single photon frequency down-or up-conversion can reach a unit by choosing appropriate parameters in the non-dissipative system with perfect chiral coupling.We present a nonreciprocal single photon beam splitter whose frequency of the output photon is different from that of the input photon. The influences of dissipations and non-perfect chiral coupling on the single frequency conversion are also shown. Our results may be useful in designing quantum devices at the single-photon level. 展开更多
关键词 Nonreciprocal Single Photon frequency conversion via Chiral Coupling between a V-Type System and a Pair of Waveguides
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Scheme for implementing frequency up-conversion between two collective atomic modes
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作者 林丽华 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第9期3890-3892,共3页
This paper presents a scheme for realizing the frequency up-conversion between two collective atomic modes. In the scheme two atomic samples are coupled to a cavity mode. Under the large detuning condition, the two co... This paper presents a scheme for realizing the frequency up-conversion between two collective atomic modes. In the scheme two atomic samples are coupled to a cavity mode. Under the large detuning condition, the two collective atomic modes are coupled via the virtual excitation of the cavity mode and the effective Hamiltonian corresponds to the frequency up-conversion. In the scheme the cavity mode is only virtually excited and thus the process is insensitive to cavity decay. 展开更多
关键词 frequency up-conversion collective atomic mode virtual excitation
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Conversion of Kinetic Energy from Synoptic Scale Disturbance to Low-Frequency Fluctuation over the Yangtze River Valley in the Summers of 1997 and 1999
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作者 李跃凤 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2007年第4期591-598,共8页
In order to investigate the conversion of kinetic energy from a synoptic scale disturbance (SSD; period≤seven days) to a low-frequency fluctuation (LFF; period〉seven days), the budget equation of the LFF kinetic... In order to investigate the conversion of kinetic energy from a synoptic scale disturbance (SSD; period≤seven days) to a low-frequency fluctuation (LFF; period〉seven days), the budget equation of the LFF kinetic energy is derived. The energy conversion is then calculated and analyzed for the summers of 1997 and 1999. The results show that the energy conversion from the SSD to the LFF is obviously enhanced in the middle and lower troposphere during the heavy rainfall, suggesting this to be one of mechanisms inducing the heavy rainfall, although the local LFF kinetic energy may not be enhanced. 展开更多
关键词 kinetic energy conversion synoptic scale disturbance low-frequency fluctuation heavy rainfall Yangtze River valley
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A transceiver frequency conversion module based on 3D micropackaging technology 被引量:4
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作者 LIU Boyuan WANG Qingping +1 位作者 WU Weiwei YUAN Naichang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2020年第5期899-907,共9页
The idea of Ku-band transceiver frequency conversion module design based on 3D micropackaging technology is proposed. By using the double frequency conversion technology,the dual transceiver circuit from Ku-band to L-... The idea of Ku-band transceiver frequency conversion module design based on 3D micropackaging technology is proposed. By using the double frequency conversion technology,the dual transceiver circuit from Ku-band to L-band is realized by combining with the local oscillator and the power control circuit to complete functions such as amplification, filtering and gain. In order to achieve the performance optimization and a high level of integration of the Ku-band monolithic microwave integrated circuits(MMIC) operating chip, the 3 D vertical interconnection micro-assembly technology is used. By stacking solder balls on the printed circuit board(PCB), the technology decreases the volume of the original transceiver to a miniaturized module. The module has a good electromagnetic compatibility through special structure designs. This module has the characteristics of miniaturization, low power consumption and high density, which is suitable for popularization in practical application. 展开更多
关键词 KU-BAND frequency conversion 3D packaging CHIP electromagnetic compatibility
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Multiple frequency conversion via atomic spin coherence of storing a light pulse
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作者 王磊 罗梦希 +6 位作者 孙家翔 孙远航 陈怡 魏小刚 康智慧 王海华 高锦岳 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第6期341-346,共6页
We experimentally demonstrate multiple frequency conversion via atomic spin coherence of storing a light pulse in a doped solid. The essence of this multiple frequency conversion is four-wave mixing based on stored at... We experimentally demonstrate multiple frequency conversion via atomic spin coherence of storing a light pulse in a doped solid. The essence of this multiple frequency conversion is four-wave mixing based on stored atomic spin coherence. Through electromagnetically induced transparency, an input probe pulse is stored into atomic spin coherence by modulating the intensity of the control field. By using two different control fields to interact with the coherently prepared medium, the stored atomic spin coherence can be transformed into three different information channels. Multiple frequency conversion is implemented efficiently by manipulating the spectra of the control fields to scatter atomic spin coherence. This multiple frequency conversion is expected to have potential applications in information processing and communication network. 展开更多
关键词 frequency conversion atomic spin coherence light storage electromagnetically induced trans-parency
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Advanced Power Module Packaging and Integration Structures for High Frequency Power Conversion:From Silicon to GaN 被引量:1
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作者 Fang LUO Lin LIANG +1 位作者 David Huitink Silke Spiesshoefer 《电力电子技术》 CSCD 北大核心 2018年第8期9-18,共10页
The emerging of commercial high-voltage gallium nitride(GaN) power devices provides extraordinary switching performance over silicone devices, which enables high-voltage power conversion switching at megahertz range.S... The emerging of commercial high-voltage gallium nitride(GaN) power devices provides extraordinary switching performance over silicone devices, which enables high-voltage power conversion switching at megahertz range.Such outstanding features also pose strong challenges for device packaging design since the package parasitics can significantly influence the device switching characteristics, and thus can shadow the advantages brought by GaN devices. Designers have been dealing with these challenges brought by high du/dt and high-frequency switching operation even since the silicon(Si) era when fast switching Si MOSFET is first developed and came up with lots of inspiring advanced power module packaging structures to mitigate the problems.This paper presents a review of advanced power module packaging and integration structures that are suitable for high frequency power conversion.The review covers the heritage from the high frequency Si MOSFET packaging to the state-of-the-art for GaN devices. 展开更多
关键词 电力行业 电力技术 电子产品 电力管理
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Green and efficient dry gel conversion synthesis of SAPO-34 catalyst with plate-like morphology 被引量:10
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作者 Chun-Yu Di Xiao-Feng Li +3 位作者 Ping Wang Zhi-Hong Li Bin-Bin Fan Tao Dou 《Petroleum Science》 SCIE CAS CSCD 2017年第1期203-213,共11页
SAPO-34 catalyst with plate-like morphology was designed and synthesized for the first time, by the dry gel conversion method using cheap triethylamine as a structure-directing agent assisted with seed suspension cont... SAPO-34 catalyst with plate-like morphology was designed and synthesized for the first time, by the dry gel conversion method using cheap triethylamine as a structure-directing agent assisted with seed suspension containing nanosheet-like SAPO-34 seed. The latter played an important role in formation of SAPO-34 (CHA-type) with plate-like morphology. In addition, the yield of the product in the synthesis system containing seed suspension reached 97%, 15% higher than that obtained in the corre- sponding synthesis system without the seed suspension. Meanwhile, the plate-like SAPO-34 catalysts synthesized by this method exhibited higher selectivity to light olefins and longer lifetime in methanol-to-olefins (MTO) reaction than the traditional cubic SAPO-34 catalyst. This work provides a new technical route for green and efficient synthesis of SAPO-34 catalysts with improved MTO performance. 展开更多
关键词 SAPO-34 Dry gel conversion GREENCHEMISTRY Seed suspension Plate-like - MTO
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电性源瞬变电磁法频-时转换的效果分析
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作者 胡英才 王瑞廷 李貅 《世界核地质科学》 CAS 2024年第2期299-311,共13页
电性源短偏移距瞬变电磁法是近年来新提出的固体矿产深部电磁探测方法之一,较传统的回线源瞬变电磁具有探测深度深、仪器轻便和分辨率高等优点。但该方法由于偏移距较短,距发射源较近,正演中的频-时转换会受到转换方法及其他工作参数的... 电性源短偏移距瞬变电磁法是近年来新提出的固体矿产深部电磁探测方法之一,较传统的回线源瞬变电磁具有探测深度深、仪器轻便和分辨率高等优点。但该方法由于偏移距较短,距发射源较近,正演中的频-时转换会受到转换方法及其他工作参数的影响,进而直接影响探测结果,因此有必要开展频-时转换效果分析评价。通过对影响频-时转换的因素以及常用的四种频-时转换方法(Guptasarma线性滤波法、折线逼近法、余弦变换的数值滤波法和正弦变换的数值滤波法)在电性源短偏移距瞬变电磁正演响应计算中的对比,从计算时间和转换精度两方面分析了在不同条件下的转换效果,为一维及高维度的瞬变电磁正演计算提供频-时转换方法参考。对比结果表明:1)影响时间域瞬变电磁场正演计算(即频-时转换效果)的精度不仅和转换方法本身有关,而且也和偏移距及地下介质电阻率等参数有关;2)通过正演模拟,在低阻探测区采用折线逼近法与正弦变换的数值滤波法相对Guptasarma线性滤波法和余弦变换的数值滤波法转换精度更高,整体误差更小,而Guptasarma线性滤波法的计算速度最快,早期计算精度较高,晚期计算精度较差;在高阻探测环境中,采用折线逼近法计算精度和速度均相对较好,Guptasarma线性滤波法、正弦变换的数值滤波法及余弦变换的数值滤波转换效果均较差,特别是在晚期。因此,对于未知的探测区域,若实现高精度的电性源瞬变电磁正演计算,采用折线逼近法进行频-时转换相对效果最佳。 展开更多
关键词 短偏移距瞬变电磁 -时转换 电性源
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Analytical solution to incident angle quasi-phase-matching engineering for second harmonic generation in a periodic-poled lithium niobate crystal
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作者 洪丽红 邱雅婷 +2 位作者 李晓霓 陈宝琴 李志远 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第2期115-123,共9页
Phase matching or quasi-phase matching(QPM)is of significant importance to the conversion efficiency of second harmonic generation(SHG)in artificial nonlinear crystals like lithium niobate(LN)crystal or microstructure... Phase matching or quasi-phase matching(QPM)is of significant importance to the conversion efficiency of second harmonic generation(SHG)in artificial nonlinear crystals like lithium niobate(LN)crystal or microstructured nonlinear crystals like periodic-poled lithium niobate(PPLN)crystals.In this paper,we propose and show that the incident angle of pump laser light can be harnessed as an alternative versatile tool to engineer QPM for high-efficiency SHG in a PPLN crystal,in addition to conventional means of period adjusting or temperature tuning.A rigorous model is established and analytical solution of the nonlinear conversion efficiency under the small and large signal approximation theory is obtained at different incident angles.The variation of phase mismatching and walk-off length with incident angle or incident wavelength are also explored.Numerical simulations for a PPLN crystal with first order QPM structure are used to confirm our theoretical predictions based on the exact analytical solution of the general large-signal theory.The results show that the narrow-band tunable SHG output covers a range of 532 nm–552.8 nm at the ideal incident angle from 0°to 90°.This theoretical scheme,fully considering the reflection and transmission at the air-crystal interface,would offer an efficient theoretical system to evaluate the nonlinear frequency conversion and help to obtain the maximum SHG conversion efficiency by selecting an optimum incident wavelength and incident angle in a specially designed PPLN crystal,which would be very helpful for the design of tunable narrow-band pulse nanosecond,picosecond,and femtosecond laser devices via PPLN and other microstructured LN crystals. 展开更多
关键词 nonlinear frequency conversion transmission REFLECTION lithium niobate
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Fabrication and properties of high performance YBa_2Cu_3O_(7-δ) radio frequency SQUIDs with step-edge Josephson junctions 被引量:1
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作者 刘政豪 魏玉科 +3 位作者 王达 张琛 马平 王越 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第9期419-422,共4页
We describe the fabrication of high performance YBa2Cu3O7-δ (YBCO) radio frequency (RF) superconducting quantum interference devices (SQUIDs), which were prepared on 5 mm×5 mm LaAlO3 (LAO) substrates by ... We describe the fabrication of high performance YBa2Cu3O7-δ (YBCO) radio frequency (RF) superconducting quantum interference devices (SQUIDs), which were prepared on 5 mm×5 mm LaAlO3 (LAO) substrates by employing stepedge junctions (SEJs) and in flip-chip configuration with 12 mm×12 mm resonators. The step in the substrate was produced by Ar ion etching with step angles ranging from 47° to 61°, which is steep enough to ensure the formation of grain boundaries (GBs) at the step edges. The YBCO film was deposited using the pulsed laser deposition (PLD) technique with a film thickness half of the height of the substrate step. The inductance of the SQUID washer was designed to be about 157 pH. Under these circumstances, high performance YBCO RF SQUIDs were successfully fabricated with a typical flux-voltage transfer ratio of 83 mV/φ0, a white flux noise of 29 μφ0/√Hz, and the magnetic field sensitivity as high as 80 fT/√Hz. These devices have been applied in magnetocardiography and geological surveys. 展开更多
关键词 superconducting quantum interference device (SQUID) YBa2Cu3O7-δ (YBCO) step-edge junction radio frequency
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Analytic approach to the small-signal frequency response of saturated semiconductor optical amplifiers using multisection model
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作者 周恩波 张新亮 黄德修 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第10期2998-3003,共6页
An analytic solution derived by multisection model to the small-signal frequency response (SSFR) of wavelength conversion based on cross-gain modulation (XGM) in semiconductor optical amplifiers (SOAs) is presen... An analytic solution derived by multisection model to the small-signal frequency response (SSFR) of wavelength conversion based on cross-gain modulation (XGM) in semiconductor optical amplifiers (SOAs) is presented. The result contains details that can affect the characteristics of SSFR significantly more than previous ones. 展开更多
关键词 wavelength conversion cross-gain modulation frequency response semiconductor optical amplifiers
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Influence of laser linewidth on external-cavity frequency doubling efficiency of a 1.56 μm master oscillator fiber power amplifier
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作者 田秀桃 李永民 +1 位作者 刘勤 张宽收 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第6期2324-2327,共4页
By using an external-cavity frequency-doubling master oscillator fiber power amplifier (MOPA), a 700 mW continuous-wave single-frequency laser source at 780 nm is produced. It is shown that the frequency doubling ef... By using an external-cavity frequency-doubling master oscillator fiber power amplifier (MOPA), a 700 mW continuous-wave single-frequency laser source at 780 nm is produced. It is shown that the frequency doubling efficiency is improved when the seed diode laser is optically locked to a resonant frequency of a confocal Fabry-Perot (F-P) cavity. This phenomenon can be attributed to the narrowing of the 1.56 μm laser linewidth and explained by our presented theoretical model. The experimental results are found to be in good agreement with the theoretical predictions. 展开更多
关键词 laser linewidth external-cavity frequency doubling conversion efficiency
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Six-bit all-optical quantization using photonic crystal fiber with soliton self-frequency shift and pre-chirp spectral compression techniques 被引量:1
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作者 康哲 苑金辉 +4 位作者 李莎 解松霖 颜玢玢 桑新柱 余重秀 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第11期345-349,共5页
In this paper, we propose an optical quantization scheme for all-optical analog-to-digital conversion that facilitates photonics integration. A segment of 10-m photonic crystal fiber with a high nonlinear coefficient ... In this paper, we propose an optical quantization scheme for all-optical analog-to-digital conversion that facilitates photonics integration. A segment of 10-m photonic crystal fiber with a high nonlinear coefficient of 62.8 W-1/kin is utilized to realize large scale soliton self-frequency shift relevant to the power of the sampled optical signal. Furthermore, a 100-m dispersion-increasing fiber is used as the spectral compression module for further resolution enhancement. Simulation results show that 317-nm maximum wavelength shift is realized with 1550-nm initial wavelength and 6-bit quantization resolution is obtained with a subsequent spectral compression process. 展开更多
关键词 all-optical analog-to-digital conversion photonic crystal fiber soliton self-frequency shift spectralcompression
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Optimizational 6-bit all-optical quantization with soliton self-frequency shift and pre-chirp spectral compression techniques based on photonic crystal fiber 被引量:1
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作者 李莎 王建萍 +1 位作者 康哲 余重秀 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第8期381-385,共5页
In this paper, we optimize a proposed all-optical quantization scheme based on soliton self-frequency shift(SSFS)and pre-chirp spectral compression techniques. A 10m-long high-nonlinear photonic crystal fiber(PCF) is ... In this paper, we optimize a proposed all-optical quantization scheme based on soliton self-frequency shift(SSFS)and pre-chirp spectral compression techniques. A 10m-long high-nonlinear photonic crystal fiber(PCF) is used as an SSFS medium relevant to the power of the sampled optical pulses. Furthermore, a 10m-long dispersion flattened hybrid cladding hexagonal-octagonal PCF(6/8-PCF) is utilized as a spectral compression medium to further enhance the resolution. Simulation results show that 6-bit quantization resolution is still obtained when a 100m-long dispersion-increasing fiber(DIF)is replaced by a 6/8-PCF in spectral compression module. 展开更多
关键词 all-optical analog-to-digital conversion soliton self-frequency shift spectral compression photonic crystal fiber
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