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Study on proportional Synchronization of Hyperchaotic Circuit System

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Communications in Theoretical physics 2005年第4期43卷 671-676页

作者： jiangde-p.ng LUOXiao-Shu WAngBin-Hong FAngJin-Qing JIAngpin-Qun CollegeofphysicsandInformationEngineering GuangxiNormalUniversityGuilin541004China DepartmentofModernphysics UniversityofScienceandTechnologyofChinaHefei230026China ChinaInstituteofAtomicEnergy Beijing102413China

In this paper, the proportional synchronization between drive system and response system is achieved by using the concept of generalized synchronization. The phase space of all variables in response system can be expanded and compressed flexibly. Meanwhile, the 6-D hyperchaotic chua's circuit is considered as an illustrative example to demonstrate the effectiveness of the proposed approach. Furthermore, focusing on the shortcoming of the long transient behavior during the process of synchronization, a feedback method is adopted to shorten the transitional time of synchronization, which will provide an effective way for speeding up the transmitting velocity of code in chaotic multiple access communication.

关键词： hyperchaos generalized synchronization projective synchronization proportional synchronization

LD pumped Q-Switching and Self-starting Mode-locked All Fiber Laser

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Chinese Journal of Lasers 1995年第3期B4卷 229-234页

作者： ZHAng Jian LI Jinghui JIAng Xing LIU Xiaoming p.ng jiangde(Department of Electronic Engineering, Tsinghua University, Beijing 100084, China) Tsinghua Univ Beijing China

ＬＤＰｕｍｐｅｄＱ－ＳｗｉｔｃｈｉｎｇａｎｄＳｅｌｆ－ｓｔａｒｔｉｎｇＭｏｄｅ－ｌｏｃｋｅｄＡｌｌＦｉｂｅｒＬａｓｅｒ￥ＺＨＡＮＧＪｉａｎ；ＬＩＪｉｎｇｈｕｉ；ＪＩＡＮＧＸｉｎｇ；ＬＩＵＸｉａｏｍｉｎｇ；ＰＥＮＧＪｉ... 详细信息

ＬＤＰｕｍｐｅｄＱ－ＳｗｉｔｃｈｉｎｇａｎｄＳｅｌｆ－ｓｔａｒｔｉｎｇＭｏｄｅ－ｌｏｃｋｅｄＡｌｌＦｉｂｅｒＬａｓｅｒ￥ＺＨＡＮＧＪｉａｎ；ＬＩＪｉｎｇｈｕｉ；ＪＩＡＮＧＸｉｎｇ；ＬＩＵＸｉａｏｍｉｎｇ；ＰＥＮＧＪｉａｎｇｄｅ（Ｄｅｐａｒｔｍｅｎｔｏ...

关键词： Q-switching passively mode-locking fiber laser

Soliton Transmission over 50Km at 2.5GHz Repetition Rate

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High Technology Letters 1995年第1期1卷 22-24页

作者： Shan, Zh. Minyu, Y. Baoxi, X. Caiyun, L. Jinghui, L. Xin, J. jiangde, p. Yizhi, G. Binkun, Zh. Tsinghua Univ Beijing China

A 2.5 GHz optical soliton transmission over 50km has been successfully achieved’for thefirst time in China by using erbium-doped fiber *** soliton pulse width is *** erbium-doped fiber amplifiers are pumped by IngaAs... 详细信息

关键词： Optical soliton Soliton transmission Soliton communication EDFA

Theoretical Calculation of MMF's Bandwidth

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Semiconductor photonics and Technology 2004年第2期10卷 113-116页

作者： LIXiao-fu jiangde-sheng YUHai-hu FiberOpticSensingTechnologyCenter WuhanUniversityofTechnologyWuhan430070CHN

The difference between over-filled launch bandwidth (OFL BW) and restricted mode launch bandwidth (RML BW) is described. A theoretical model is founded to calculate the OFL BW of grade index multimode fiber (GI-MMF),a... 详细信息

关键词： MMF OFL BW RML BW Model Calculation

A　0．98μm　Laser　Diode　pumped　Erbium－Doped　Fiber　Amplifier　with　40nm　Bandwidth

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Chinese Journal of Lasers 1994年第1期B3卷 21-25页

作者： LI Jinghui p.ng jiangde JIAng Xin YAO Minyu WU Gengsheng FAN Chongcheng ZHOU Bingkun(Dept. of Electronic Engineering, Tsinghua Universfity, Beijing 100084,China) Tsinghua Univ Beijing China

Ａ０．９８μｍＬａｓｅｒＤｉｏｄｅＰｕｍｐｅｄＥｒｂｉｕｍ－ＤｏｐｅｄＦｉｂｅｒＡｍｐｌｉｆｉｅｒｗｉｔｈ４０ｎｍＢａｎｄｗｉｄｔｈ￥ＬＩＪｉｎｇｈｕｉ；ＰＥＮＧＪｉａｎｇｄｅ；ＪＩＡＮＧＸｉｎ；ＹＡＯＭｉｎｙｕ；Ｗ... 详细信息

Ａ０．９８μｍＬａｓｅｒＤｉｏｄｅＰｕｍｐｅｄＥｒｂｉｕｍ－ＤｏｐｅｄＦｉｂｅｒＡｍｐｌｉｆｉｅｒｗｉｔｈ４０ｎｍＢａｎｄｗｉｄｔｈ￥ＬＩＪｉｎｇｈｕｉ；ＰＥＮＧＪｉａｎｇｄｅ；ＪＩＡＮＧＸｉｎ；ＹＡＯＭｉｎｙｕ；ＷＵＧｅｎｇｓｈｅｎｇ；ＦＡＮＣｈｏ...

关键词： laser diode pump Erbium doped fiber amplifier

Null Fiber Coupler with Ultra-high Splitting Ratio of 100000∶1 for All-fiber Acousto-optic Switch

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Chinese Journal of Lasers 2000年第6期 40-45页

作者： LI Tong p.ng jiangde LI Qun LIU Xiaoming (Department of Electronics Engineering, Tsinghua University, Beijing 100084, China)

A fiber null coupler with very high splitting ratio of 100000∶1 and low excess loss of 0.1 dB is reported. The control of the maximum splitting ratio and loss of the null coupler is studied. Its switching function is... 详细信息

关键词： fiber coupler acousto optic switch

Optimization Design of Superluminescent Diodes with RWG Structure for High Efficiency Coupling with SMFs

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Journal of Semiconductors 2006年第4期27卷 683-687页

作者：钟馨黄翊东赵涵张巍彭江得清华大学电子工程系集成光电子学国家重点实验室北京100084

With the aim of achieving high coupling power of RWG SLDs into SMFs,the structure dependences of the output power and the near field pattern are investigated. The thicknesses of the layers between the active region and the ridge waveguide are optimized by taking into account the injected carrier distribution and local material gain in the SLD cross section.

关键词： superluminescent diode coupling efficiency injection efficiency

低泵浦功率的遥泵放大在超长跨距密集波分复用系统中的应用

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光子学报 2006年第9期35卷 1358-1362页

作者：张帆张巍冯雪彭江得清华大学电子工程系北京100084

针对长跨距密集波分复用系统中喇曼放大入纤泵浦功率过大的问题,将遥泵放大器(RpEDFA)引入到系统中,通过对共纤RpEDFA的噪音性能及其优化设计的研究,在理论上计算比较了RpEDFA系统和后向喇曼放大系统在不同泵浦功率水平下的光信噪比和... 详细信息

针对长跨距密集波分复用系统中喇曼放大入纤泵浦功率过大的问题,将遥泵放大器(RpEDFA)引入到系统中,通过对共纤RpEDFA的噪音性能及其优化设计的研究,在理论上计算比较了RpEDFA系统和后向喇曼放大系统在不同泵浦功率水平下的光信噪比和非线性相移,表明遥泵放大技术有效降低了入纤泵浦的功率水平,更适合长跨距应用.运用遥泵放大技术,对一个典型的长跨距系统进行系统Q值的模拟,结果表明:在220mW泵浦功率水平下可以实现跨距为167km的40×11.6Gbit/s系统1000km传输,Q值裕量4.4dB.

关键词：遥泵放大长跨距传输中继系统波分复用系统

Characteristics of the bandwidth in gain-clamped erbium-doped fiber amplifiers

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Chinese Journal of Lasers 1997年第2期 97-102页

作者： CHEN Zhihao p.ng jiangde ZHOU Bingkun(Dept. of Electronic Engineering, Tsinghua University, Beijing 100084, China)

A new method for determining the gain pro files in gain-clamped erbiumdoped fiber amplifier(EDFAs) is propsed. Analytical model for gain profiles is complately characterized from easily measuted perameters at only one signal wavelength: erbium-dop.ng abeorption cocfficient, background loss coefficient, and temperature. It is shown that results predicted from the model agtee well with the experiment data, confirming the validity of the theoretical model. Using this model, we analyze the effects of the lasing wavelengths and the Cavity losses on amplifier bandwidth in gnin-clamped EDFAs. It is found that lasing wavelengths and cavity losses have a great influence on the amplifier bendwidth for Er-doped germano-aluminosilcate fiber with high A1 concentration and have no effects for Er-doped germanoslicate fiber.

关键词： erbium-doped fiber amplifier erbium-doped fiber laser gain profile