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Semiconductor quantum dot-doped glass as spectral converter for photovoltaic application

Chinese Science Bulletin 2014年第1期59卷 16-22页

作者： Lu Sun Chun Jiang State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University

In this article,we focus on using the multiexciton generation(MEG)effect of quantum dot(QD)to realize quantum cutting of high-energy photons which will give rise to a remarkable increase of total photon *** avoid the complicated solving of Schro¨dinger equation,we take approximations and develop a method for fast evaluating the quantum efficiency of MEG *** this basis,we calculate the detailed balance limit of efficiency of Si single-junction solar cell with Si QD-doped glass placed on top of it as a spectral converter *** shows that the efficiency will reach 36%which is 6%higher than that without the converter *** have also explored the influence of QD radius,QD-doping density,QD,and host material,device working temperature on the efficiency.

关键词：半导体量子点掺杂玻璃转换器光谱应用光伏太阳能电池量子剪裁

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Wavelength dimensioning for wavelength-routed WDM satellite network

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Chinese Journal of Aeronautics 2016年第3期29卷 763-771页

作者： Liu Zhe Guo Wei Deng Changlin Hu Weisheng State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

Internet and broadband applications driven by data traffic demand have become key dri- vers for satellite constellations. The key technology to satisfy the high capacity requirements between satellites is optical satellite networks by means of wavelength division multiplexing inter- satellite links （ISLs） with wavelength routing （WDM-OSN）. Due to the limited optical amplifier bandwidth onboard the satellite, it is important to minimize the wavelength requirements to provi- sion requests. However, ISLs should be dynamically established and deleted for each satellite according to its visible satellites. Furthermore, different link assignments will result in different topologies, hence yielding different routings and wavelength assignments. Thus, a perfect match model-based link assignment scheme （LAS-PMM） is proposed to design an appropriate topology such that shorter path could be routed and less wavelengths could be assigned for each ISL along the path. Finally, simulation results show that in comparison to the regular Manhattan street net- work （MSN） topology, wavelength requirements and average end-to-end delay based on the topol- ogy generated by LAS-PMM could be reduced by 24.8% and 12.4%, respectively.

关键词： LAS LAS-PMM Routing Wavelength assignment Wavelength dimensioning WDM-OSN

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A 2 by 2 wavelength tunable Fabry-Perot filter by using an electro-optic polymer film

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Chinese Optics Letters 2004年第11期2卷 624-626页

作者：李新碗叶爱伦陈建平吴龟灵 State Key Lab on Local Fiber Optical Communication Networks and Advanced Optical Communication Systems

A tunable Fabry-Perot (F-P) filter by using electro-optic polymer film is proposed. The electro-optic polymer is alkoxysilane dye (ASD)/SiO2-TiO2 hybrid material, whose electro-optic coefficient 733 is about 5 pm/V, The wavelength tuning range of 3.8 nm under 400-V DC voltage and the nonlinear characteristic with the electric field have been obtained via electro-optical properties of polymer. Both of polymer film fabrication and F-P filter design have been introduced. The tunable F-P filter is designed for the application of two-input/two-output port wavelength-selective optical switch. Also, some problems have been discussed in this letter.

关键词： Dyes Electrooptical materials optical communication equipment optical films optical switches Organic polymers

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Design of Raman-parametric fiber amplifier for wavelength division multiplex transmission system

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Chinese Optics Letters 2008年第5期6卷 327-330页

作者：江晓弘姜淳章晓鸣 State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

We optimize the novel configuration of a hybrid fiber amplifier - Raman assisted-fiber-based optical parametric amplifier （R-FOPA）, in which the parametric gain and Raman gain profiles are combined to achieve a flat composite gain profile. The pump powers and the fiber length in the hybrid amplifier are effectively optimized by genetic algorithm （GA） scheme. The optimization results indicate that the RFOPA can achieve a 200-nm flat bandwidth spectrum with the gain of 20 dB and ripple of less than 4 dB.

关键词： Computer networks Electric power transmission Fiber amplifiers Fiber optics Genetic algorithms Light amplifiers Microwave amplifiers Multiplexing Optimization Parametric amplifiers Parametric devices

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Distribution of millimeter waves over a fiber link with high frequency stability(Invited Paper)

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Chinese Optics Letters 2016年第12期14卷 21-24页

作者：董毅刘张唯一王小成邓楠谢玮霖胡卫生 State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

We present a theoretical analysis, systematic simulation, and experimental measurements for the phase noise,timing jitter, and frequency stability in the frequency distribution of millimeter waves over distant optical fiber links. The conception that the dissemination of a higher frequency reference instead of a lower one can achieve a better frequency stability is discussed and verified. We find that the system＇s noise floor, including thermal noise,shot noise, and any other noise from electronic components, is considered to be a fundamental limitation for a frequency reference transmission system. Benefiting from the high-precision time delay variation discrimination and accurate locking control operation, a highly stabilized reference is distributed to a remote end over a 60 km spooled fiber, achieving a frequency stability of 4 × 10^（-17） at an average time 1000 s, corresponding to 23 fs of RMS timing jitter（0.01 Hz^（–1） MHz）.

关键词： millimeter jitter dissemination discrimination links conception locking distant instead verified

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Joint optimizing of interleaving and LDPC decoding for burst errors in PON systems

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Science China(Information Sciences) 2020年第2期63卷 233-235页

作者： Lei ZHANG Chuanchuan YANG Fan ZHANG State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University

Dear editor,Driven by the continuously increasing demand for large capacity data services, the upgrade for high speed passive optical network (PON) system is of great importance. To meet the stringent optical power bu... 详细信息

关键词： PON Joint optimizing of interleaving and LDPC decoding for burst errors in PON systems

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On the stability of multicast flow aggregation in IP over optical network for IPTV delivery

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Chinese Optics Letters 2008年第8期6卷 553-557页

作者：罗萱金耀辉曾庆济孙卫强郭薇胡卫生 State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

The stable multicast flow aggregation （MFA） problem in internet protocol （IP） over optical network under the dynamical scenario is studied. Given an optical network topology, there is a set of head ends and access touters attached to the optical network, in which each head end can provide a set of programs （IP multicasting flows） and each access router requests a set of programs, we find a set of stable light-trees to accommodate the optimally aggregated multicast IP flows if the requests of access touters changed dynamically. We introduce a program correlation matrix to describe the preference of end users＇ requests. As the original MFA problem is NP-complete, a heuristic approach, named most correlated program first （MCPF）, is presented and compared with the extended least tree first （ELTF） algorithm which is topology- aware. Simulation results show that MCPF can achieve better performance than ELTF in terms of stability with negligible increment of network resource usage.

关键词： Agglomeration Electric network topology Fiber optic networks Heuristic algorithms Heuristic programming Internet Mobile telecommunication systems Multicasting Nuclear propulsion optical data processing optical materials Routers Topology Trees (mathematics)

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Thulium-Doped Fiber Amplifier for Blue Light Signal Amplification

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China communications 2019年第5期16卷 181-188页

作者： Muhammad Hanif Ahmed Khan Khushik Chun Jiang State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

Fluoride-based thulium-doped visible light fiber amplifier(TmVLFA), which can be used to amplify the blue light signal for a visible light communication(VLC) system,is theoretically demonstrated for the first time according to the best of our knowledge. The transition rate equations and power propagation equations are solved to predict the dependence of the gain and noise figure on fiber parameters. The numerical results show that with the pump wavelength 1150 nm and pump power 800 mW, 2.75 m long thulium-doped fiber can amplify blue light(480 nm) signal up to 33.3 dB, and the noise figure is in the range from 3.0 to 3.5 dB. The model and numerical results encourage the use of fiber amplifier in VLC system for blue light amplification to extend the range of VLC.

关键词： Tm-doped visible light fiber amplifier visible light communication fiber amplifier gain noise figure

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Compact 517 MHz soliton mode-locked Er-doped fiber ring laser

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Photonics Research 2016年第1期4卷 27-29页

作者： Jian Zhang Ziyun Kong Yizhou Liu Aimin Wang Zhigang Zhang State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University

We report on a compact passive mode-locked Er:fiber ring laser operated at the fundamental repetition rate of 517 MHz, which we believe is the highest fundamental repetition rate ever reported in a ring cavity fiber *** key technique is the employment of two innovative high-power wavelength domain multiplexer collimators with all gain fiber cavity suited for the high power(up to 2 W) pumping. The laser is featured with a direct chirpfree output pulse, which is 97 fs without extracavity compression at an average output power of 90 mW.

关键词： mode rate Compact 517 MHz soliton mode-locked Er-doped fiber ring laser ring

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All-fiber high-resolution computational spectropolarimeter based on speckle pattern

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Chinese Optics Letters 2024年第12期22卷 95-100页

作者： Qianyu Zhou Yangyang Wan Xinyu Fan Zuyuan He State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China

The lightwave field possesses several dimensional properties,including amplitude,spectrum,phase,and *** measurements of lightwaves have diverse applications ranging from remote sensing to analytical ***,achieving high-resolution simultaneous multi-dimensional measurement of lightwaves remains *** this work,we demonstrate an all-fiber spectropolarimeter based on a speckle pattern obtained from the end of a multi-mode *** proposed system simultaneously achieves a spectral resolution of 100 pm and a polarization resolution of *** polarization measurement errors for three Stokes parameters are 3.37%,1.01%,and 0.84%,respectively,with a mean squared error of 5.3×10^(-5).This work provides novel potential for high-resolution and accurate multi-dimensional lightwave field measurements.

关键词： spectropolarimeter speckle pattern multi-mode fiber

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