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半导体光放大器的非简并时延四波混合理论 被引量:2
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作者 胡振华 黄德修 《光学学报》 EI CAS CSCD 北大核心 2004年第8期1062-1066,共5页
用二能级宽带模型研究了半导体光放大器 (SOA)中非简并相共轭四波混合信号强度随时间延迟的变化规律。结果表明 ,对这种情形的非简并四波混合共轭信号强度随时间延迟τ变化表明为载流子脉动 ,且脉动信号以退相速率衰减。鉴于目前用简并... 用二能级宽带模型研究了半导体光放大器 (SOA)中非简并相共轭四波混合信号强度随时间延迟的变化规律。结果表明 ,对这种情形的非简并四波混合共轭信号强度随时间延迟τ变化表明为载流子脉动 ,且脉动信号以退相速率衰减。鉴于目前用简并四波混合对半导体光放大器超快过程的测量需要大功率激光器作激发源、大光学实验平台和复杂的探测设备的情况下 ,提出了基于全光通信器件构成非简并四波混合观测半导体光放大器载流子脉动、退相时间新方法 ,这不仅便于选取抽运与探测光源波长 (光通信窗口波长 ) 。 展开更多
关键词 非线性光学 半导体光放大器 四波混合 载流子脉动 退相时间测量 全光纤通信器件
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求解四阶多项时间分数阶混合扩散-波方程的二阶差分格式
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作者 高广花 徐鹏 《扬州大学学报(自然科学版)》 CAS 北大核心 2022年第4期24-35,共12页
为求解二维四阶多项时间分数阶混合扩散-波方程,基于降阶法将时间分数阶扩散项和分数阶波动项分别转换为时间分数阶积分项和扩散项,并在时间方向分别应用L2-1公式和分片线性插值方法进行离散,对空间四阶导数项也进行降阶处理,建立差分... 为求解二维四阶多项时间分数阶混合扩散-波方程,基于降阶法将时间分数阶扩散项和分数阶波动项分别转换为时间分数阶积分项和扩散项,并在时间方向分别应用L2-1公式和分片线性插值方法进行离散,对空间四阶导数项也进行降阶处理,建立差分求解格式.利用能量分析法对所得格式的稳定性和收敛性进行严格分析,结果显示其无条件稳定且在时间和空间方向上都是二阶收敛.数值算例证实所得数值格式的精度和有效性. 展开更多
关键词 阶多项时间分数阶混合扩散-方程 差分格式 稳定性 收敛性
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混合光缆线路与色散分布光缆(上) 被引量:1
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作者 徐乃英 《邮电设计技术》 2002年第11期12-17,共6页
介绍了为扩大波分复用光缆系统的传输容量而采用的、由2种不同类型光纤组成的各种混合光缆线路,描述了一些制造商开发出来的沿长度具有不同色散值和不同有效面积的光纤和光缆及其试验结果,最后展望了这种光缆的未来发展。
关键词 混合光缆线路 色散分布 光缆 非线性效应 四波混合 色散斜率 密集分复用 有效面积 信道间隔 光纤通信
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混合光缆线路与色散分布光缆(下)
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作者 徐乃英 《邮电设计技术》 2002年第12期28-34,共7页
介绍了为扩大波分复用光缆系统的传输容量而采用的、由2种不同类型光纤组成的各种混合光缆线路,描述了一些制造商开发出来的沿长度具有不同色散值和不同有效面积的光纤和光缆及其试验结果,最后展望了这种光缆的未来发展。
关键词 混合光缆线路 色散分布光缆 密集分复用 信道间隔 四波混合 非线性效应 色散斜率
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毫微微秒脉冲技术
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作者 吕百达 《激光杂志》 CAS 1985年第2期57-64,78,共9页
本文综述了毫微微秒脉冲技术的理论和实验结果。
关键词 锁模技术 泵浦速率 激活介质 脉冲振幅 超短光脉冲 若丹明 环形激光器 小信号增益 脉冲宽度 四波混合
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G.655光纤的特点及其应用
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作者 唐红炬 《电信工程技术与标准化》 2001年第2期40-41,共2页
要随着长途通信传输容量的成倍增长,以10Gbit/S为基础的波分复用技术全面走向商用。新开发的G.655光纤是开通大容量传输系统的较好的媒介。
关键词 分复用 光纤 四波混合 G.655
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光电子技术与器件 光放大、控制与器件
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《中国光学》 CAS 2005年第1期69-70,共2页
TN152 2005010519 共聚焦生物芯片扫描仪中PMT电流增益的自动控制= Auto gain control of the PMT used in confocal biochip scanner[刊.中]/王立强(浙江大学国家光学仪器工程技术研究中心.浙江.杭州(310027)).陆祖康…∥光子学报... TN152 2005010519 共聚焦生物芯片扫描仪中PMT电流增益的自动控制= Auto gain control of the PMT used in confocal biochip scanner[刊.中]/王立强(浙江大学国家光学仪器工程技术研究中心.浙江.杭州(310027)).陆祖康…∥光子学报.- 2004,33(3).-314-317 根据共聚焦生物芯片扫描仪获得的图像.设计了计算机控制下的PMT电流增益自动控制系统。根据计算生物芯片图像的灰度分布与期望灰度分布的差异。 展开更多
关键词 半导体光放大器 时间延迟 研究进展 灰度分布 电流增益 器件 图像 四波混合 生物芯片扫描仪 自动控制系统
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采用光子晶体光纤进行40 Gb/s传输
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作者 郝云 《光电子技术与信息》 2004年第3期12-12,共1页
丹麦技术大学首次在长的大模式面积PCF中进行了传输。在高非线性PCF(MNL-PCF)中,通过光相位共轭(OPC)大模式面积PCF与色散补偿一起进行40 Gb/s信号的色散限制时,则需要某种形式的色散补偿.
关键词 PCF 光子晶体光纤 色散补偿 四波混合
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Signal-Pressure Curves of Cascaded Four-Wave Mixing in Gas-Filled Capillary by fs Pulses
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作者 CHENBao-Zhen HUANGZu-Qia 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第3期526-528,共3页
The theoretical framework for the cascaded four waves mixing (CFWM) in gas-filled capillary by fs pulses is constructed. Based on the theoretical framework, the signal-pressure curves (SPC) of the CFWM in gas-filled c... The theoretical framework for the cascaded four waves mixing (CFWM) in gas-filled capillary by fs pulses is constructed. Based on the theoretical framework, the signal-pressure curves (SPC) of the CFWM in gas-filled capillary by fs pulses are calculated. With a comparison between the theoretical and experimental SPC we have discussed the influence of the walk-off and Phase modulation on the SPC. At the same time, we have discussed the possible origin of the first three peaks of the SPC. 展开更多
关键词 gas-filled capillary fs pulses cascaded four-wave mixing signal-pressurecurves
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Double-Cascade Continuous-Wave Four-Wave Mixing Scheme in a Coherent Cold Atomic Medium
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作者 LIJia-Hua CHENAi-Xi +1 位作者 ZHANZhi-Ming PENGJu-Cun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第6期1111-1114,共4页
We demonstrate the efficient generation of coherent light in a four-level double-cascade atomic medium by continuous-wave low-intensity laser radiation. We derive the corresponding explicit analytical expressions for ... We demonstrate the efficient generation of coherent light in a four-level double-cascade atomic medium by continuous-wave low-intensity laser radiation. We derive the corresponding explicit analytical expressions for the generated four-wave mixing (FWM) field. Dependencies of the intensity of the generate FWM field on the propagation distance, on the input-wave intensity, and on the photon detuning are investigated. To conclude, we also give a brief discussion on the experimental realization of the proposed scheme. 展开更多
关键词 continuous wave four-wave mixing atomic coherence
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Optical and Electrical Properties of Polyimide Thin Films Doped-Cu-phthalocyanine Polymerized by Vapor Phase Deposition
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作者 ZHENGJian-bang WANGYuan 《Semiconductor Photonics and Technology》 CAS 2005年第2期94-98,共5页
Using Cu-phthalocyanine(CuPc),4,4’-diaminodiphenyl ether and pyromellitic dianhydride as monomer materials, polyimide(PI) thin films doped-CuPc have been prepared onto glass substrate by vapor phase co-deposition... Using Cu-phthalocyanine(CuPc),4,4’-diaminodiphenyl ether and pyromellitic dianhydride as monomer materials, polyimide(PI) thin films doped-CuPc have been prepared onto glass substrate by vapor phase co-deposition polymerization under a vacuum of 2×10-3Pa and thermal curing of polyamic acid film in at temperature of 150-200℃ for 60min. In this process, the polymerization can be carried out through controlling the stoichiometric ratio, heating time and deposition rates of the three monomers. IR spectrum identifies the designed chemical structure of the polymer. The absorption of polyimide doped-CuPc is very intense in vis-range and near-infrared by UV-Vis spectrum. And, the PI films doped-CuPc polymerized by vapor phase deposition have uniformity, fine thermal stability and good nonlinear optical properties, and the third-order optical nonlinear susceptibility χ(3) with degenerate four-wave mixing can be 1.984×10-9ESU. 展开更多
关键词 Nonlinear optical materials Cu-phthalocyanine POLYIMIDE Vapor phase deposition polymerization Degenerate four-wave mixing
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Big Third-order Nonlinear Optical Properties of Two Poly[(3-alkylthiophene-2, 5-diyl)-(benzylidenequinomethane-2, 5-diyl)] Derivatives
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作者 GAOChao WUHong-cai +3 位作者 YIWen-hui LIBao-ming SUNJian-ping MENGLing-jie 《Semiconductor Photonics and Technology》 CAS 2005年第2期99-102,共4页
Two novel poly[(3-alkylthiophene-2,5-diyl)-(benzylidenequinomethane-2,5-diyl)s] derivatives, poly[ (3-butylthiophene-2,5-diyl)-( p-N,N-dimethylamino) benzylidenequinomethane-2,5-diyl) ] ( PBTDMABQ) and poly [( 3-octyl... Two novel poly[(3-alkylthiophene-2,5-diyl)-(benzylidenequinomethane-2,5-diyl)s] derivatives, poly[ (3-butylthiophene-2,5-diyl)-( p-N,N-dimethylamino) benzylidenequinomethane-2,5-diyl) ] ( PBTDMABQ) and poly [( 3-octylthiophene2,5-diyl) -(p-N, N-dimethylamino ) benzylidenequinomethane-2, 5-diyl)] (POTDMABQ), were synthesized.The band gaps of the two polymers are calculated as 1. 75 eV for PBTDMABQ and 1. 69 eV for POTDMABQ,respectively. The homogenous films of the two polymers were prepared and their third-ordernonlinear optical properties were studied by the backward degenerate four-wave mixing at 532 nm. Byusing the relative measurement technique, the third-order nonlinear optical susceptibilities ofPBTDMABQ and POTDMABQ are calculated as 5. 62 X 10^(-9) and 1. 22 X 10^(-8) ESU, respectively. It isfound that substituted alky groups have strong effects on the band gap and nonlinear opticalproperties of the two polymers. The relatively big third-order nonlinear optical susceptibilitiesand small band gap of POTDMABQ resulted mainly from the longer alkyl with strong electron-donatingability can enhance the delocation degree of conjugated π electronics. 展开更多
关键词 poly [( 3-alkylthiophene)-( benzylidenequinomethane)] derivatives degeneratefour-wave mixing third-order nonlinear susceptibility band gap
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Ultraslow Propagation of Entangled State via Four-Wave Mixing in a Coupled Double Ouantum Well
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作者 丁春玲 刘继兵 +1 位作者 吕新友 郝向英 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第4期653-658,共6页
An analytical method based on four-wave mixing (FWM) is here developed to study the generation of entangled state in an asymmetric semiconductor double quantum well structure. It is found that the maximally entangle... An analytical method based on four-wave mixing (FWM) is here developed to study the generation of entangled state in an asymmetric semiconductor double quantum well structure. It is found that the maximally entangled state of two beams (the probe and four-wave mixing beams) can be achieved in an appropriate condition. Moreover, we also show that the two entangled beams propagate with ultraslow group velocity in the semiconductor medium. This investigation can be used for achieving the entangled beams in the semiconductor solid-state medium, which is much more practical than that in an atomic medium because of its flexible design and the wide adjustable parameters. 展开更多
关键词 four-wave mixing (FWM) entangled state semiconductor quantum well
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Suppression intra-channel four-wave mixing by strong dispersion management in 160 Gb/s OTDM RZ 100 km transmission 被引量:2
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作者 JIA Nan LI TangJun ZHONG KangPing WANG MuGuang LI Jing 《Chinese Science Bulletin》 SCIE EI CAS 2011年第25期2744-2747,共4页
The effect of intra-channel four-wave mixing on the performance of a 160 Gb/s OTDM RZ 100 km transmission system is analyzed. Strong dispersion management to suppress the detrimental effects of intra-channel four-wave... The effect of intra-channel four-wave mixing on the performance of a 160 Gb/s OTDM RZ 100 km transmission system is analyzed. Strong dispersion management to suppress the detrimental effects of intra-channel four-wave mixing is presented theoretically and verified experimentally. Results demonstrate that amplitude fluctuation and ghost pulses are well suppressed by strong dispersion management. Stable (>2 h) error-free (10-12 ) transmission over 100 km is achieved without forward-error correction, and the power penalty is ~3.6 dB. 展开更多
关键词 色散管理 传输系统 四波混合 OTDM 通道 公里 Gb 混频
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其它计算机理论与技术
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《电子科技文摘》 2000年第12期113-116,共4页
Y2000-62079-51 0020975量子点和线=Quantum dots and wires[会,英]//1999IEEE Conference on Lasers and Electro-Optics.—51~55(F)本部分收录7篇论文摘要。研究了:单一半导体量子点的光学光谱学,ZnSe 中自集中量子点的光谱学研究,... Y2000-62079-51 0020975量子点和线=Quantum dots and wires[会,英]//1999IEEE Conference on Lasers and Electro-Optics.—51~55(F)本部分收录7篇论文摘要。研究了:单一半导体量子点的光学光谱学,ZnSe 中自集中量子点的光谱学研究,自集中 InAs 量子点中中红外过渡的光饱和:LO光子瓶颈的事件研究.半导体量子点的飞秒内外波段光谱学,量子线中的量子受限 Stark 效应和相位空间激励子(exciton)猝灭,1维电子空穴等离子光谱的波带间隙在正常化和 Coulomb 相关效应,利用四波混合研 GaAs T 型量子线中的激励子、双激励子和相位变化。 展开更多
关键词 神经网络 理论与技术 半导体量子点 量子线 计算机 等离子光谱 光学光谱学 量子受限 事件研究 四波混合
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同轴电缆通信与光通信
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《电子科技文摘》 2000年第12期79-79,共1页
Y2000-62079-214 0020598用于通信系统的非线性元件=Nonlinear componentsfor communications systems[会,英]//1999 IEEE Con-ference on Lasers and Electro-Optics.—214~219(F)本部分收录7篇论文摘要。内容是:100Gb/s 全光解复用... Y2000-62079-214 0020598用于通信系统的非线性元件=Nonlinear componentsfor communications systems[会,英]//1999 IEEE Con-ference on Lasers and Electro-Optics.—214~219(F)本部分收录7篇论文摘要。内容是:100Gb/s 全光解复用器的误码率特性,用于干涉交换应用的半导体光学放大器的建模研究,用于中距光谱反转的半导体放大器中的双向四波混合的理论和实践,用于中距光谱反转色散补偿的集成泵浦激光器和半导体光放大器中的四波混合的验证,铌酸锂波导中采用工程伪相位匹配结构的多通道波长转换。 展开更多
关键词 中距光谱反转 同轴电缆通信 光通信 半导体光放大器 半导体光学放大器 四波混合 全光解复用器 色散补偿 论文摘要 通信系统
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Mechanisms of self-similar pulses generation in a normal dispersion-decreasing fiber
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作者 冯又层 夏舸 《Optoelectronics Letters》 EI 2012年第1期52-55,共4页
Based on the principle of virtual equivalent gain,the evolution of self-similar pulses in a normal dispersion-decreasing fiber is investigated.The occurrence of wave breaking during the process under highly nonlinear ... Based on the principle of virtual equivalent gain,the evolution of self-similar pulses in a normal dispersion-decreasing fiber is investigated.The occurrence of wave breaking during the process under highly nonlinear conditions and the effect of its revealed four-wave mixing on the process are also analyzed.The results indicate that the pulse spectrum broadeningin the initial stage is dominated by self-phase modulation while by four-wave mixing in the later stage.The more intense nonlinearity is,the faster the pulse evolution converges to the self-similarity synchronously in both the time domain and the spectrum domain. 展开更多
关键词 Magnetic materials
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High Efficiency Four-Wave Mixing with Relaxation Coupling of Longitude-Optical Phonons in Semiconductor Quantum Wells
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作者 佘彦超 郑学军 +1 位作者 王登龙 丁建文 《Communications in Theoretical Physics》 SCIE CAS CSCD 2015年第5期599-604,共6页
The time-dependent analysis of four-wave mixing(FWM) has been performed in four-level double semiconductor quantum wells(SQWs) considering the cross-coupling of the longitude-optical phonons(LOP) relaxation. It is sho... The time-dependent analysis of four-wave mixing(FWM) has been performed in four-level double semiconductor quantum wells(SQWs) considering the cross-coupling of the longitude-optical phonons(LOP) relaxation. It is shown that both the amplitude and the conversion efficiency of the FWM field enhance greatly with the increasing strength of cross-coupling of LOP relaxation. Interestingly, a double peak value of the conversion efficiency is obtained under a relatively weak single-photon detuning considering the LOP coupling. When the detuning becomes stronger,the double peaks turn into one peak appearing at the line respect to the about equality two control fields. The results can be interpreted by the effect of electromagnetically induced transparency and the indirect transition. Such controlled high efficiency FWM based on the cross-coupling LOP may have potential applications in quantum control and communications. 展开更多
关键词 four-wave mixing semiconductor quantum well phonon coupling
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