检索结果-南通市图书馆

Chinese Optics Letters 2024年第10期22卷 25-32页

作者： Yundong Hao Zefeng Li Sensen Meng Bo Liu Zhende Zhai Lei Zheng Ye Wang Yange Liu Institute of Modern Optics Nankai UniversityTianjin 300350China Shenzhen Sublime photonics Co. Ltd.Shenzhen 518000China

We have prepared kilometer-scale low-loss hollow-core nested anti-resonant nodeless fibers by improving their structural design,which reduces the difficulty of fabricating low-loss hollow-core fibers over long *** lowest loss is 2.7 d B/km at 1506 nm,and this loss is less than 5 d B/km at 1417–1620 ***-precision frequency transfer is achieved using the fabricated 1050 m hollow-core fiber by locking the repetition frequency of the optical frequency comb to a rubidium atomic *** frequency stability is 1.67×10^(-12)/s and 5.66×10^(-14)/1000 s when the temperature is changed,and no phase compensation device is *** is an order of magnitude lower compared to that of the conventional single-mode fiber.

关键词： hollow-core anti-resonant fiber thermal coefficient delay frequency transfer femtosecond comb

A polarization stabilizer up to 12.6 krad/s with an additional function of stable state of polarization transformation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2010年第4期19卷 309-315页

作者：张晓光方光青赵鑫媛张文博席丽霞熊前进李喜祥张光勇 Key Laboratory of Information photonics and Optical Communications Ministry of EducationBeijing University of Posts and Telecommunications Network Research Department Huawei Technologies Co.Ltd.

This paper reports on an experiment about a novel method of polarization stabilization. The polarization stabilizer proposed here has an additional function of polarization transformation from any state of polarization into any others. The particle swarm optimization is introduced as a control algorithm in the process of either searching or endless tracking. The tracking speed of the stabilizer is obtained up to 12.6 krad/s by using hardware we have in the laboratory, which means that we can achieve a higher speed practical polarization stabilizer if we have faster hardware.

关键词： state of polarization stabilization optical fibre communications

Self-aligned single-electrode actuation of tangential and wineglass modes using PMN-PT

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2023年第3期9卷 43-49页

作者： Ozan Erturk Kilian Shambaugh Ha-Seong Park Sang-Goo Lee Sunil A.Bhave OxideMEMS Lab Purdue UniversityWest LafayetteINUSA Polytec Inc. IrvineCAUSA iBULe photonics Company ltd. Incheon 21999South Korea

Considering the evolution of rotation sensing and timing applications realized in micro-electro-mechanical systems(MEMS),flexural mode resonant shapes are outperformed by bulk acoustic wave(BAW)counterparts by achieving higher frequencies with both electrostatic and piezoelectric *** the 1-30 MHz range,which hosts BAW gyroscopes and timing references,piezoelectric and electrostatic MEMS have similar transduction ***,when designed intelligently,electrostatic transduction allows self-alignment between electrodes and the resonator for various BAW modes,misalignment is inevitable regarding piezoelectric transduction of BAW modes that require electrode *** this paper transverse piezoelectric actuation of[011]oriented single crystal lead magnesium niobate-lead titanate(PMN-PT)thin film disks are shown to excite the tangential mode and family of elliptical compound resonant modes,utilizing a self-aligned and unpatterned electrode that spans the entire disk *** resonant mode coupling is achieved by employing a unique property of[011]PMN-PT,where the in-plane piezoelectric coefficients have opposite *** 1-port disk transducers,RF reflection measurements are performed that demonstrate the compound mode family shapes in the 1-30 MHz *** verification of mode transduction is achieved using in-plane displacement measurements with Polytec’s laser Doppler vibrometer(LDV).While the tangential mode achieves a 40°/s dithering rate at 335 kHz resonant frequency,the n=2 wine-glass mode achieves 11.46 nm tip displacement at 8.42 MHz resonant frequency on a radius of 60μm disk resonator in air.A single electrode resonator that can excite both tangential and wine-glass modes with such metrics lays the foundation for a BAW MEMS gyroscope with a built-in primary calibration stage.

关键词： resonator electrode piezoelectric

An experiment of PMD compensation in 40-Gb/s PSBT transmission system

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2010年第9期8卷 816-818页

作者：田凤席丽霞张晓光翁轩张光勇熊前进 Key Laboratory of Information photonics and Optical Communications (Beijing University of Posts and Telecommunications) Ministry of Education Network Research Department Huawei Technologies Co. Ltd.

An adaptive polarization mode dispersion （PMD） compensation experiment is reported in a 40-Gb/s phase shaped binary transmission （PSBT） communication system, with the use of a new digital signal processor （DSP）-based optical PMD compensator. PMD tolerance is found to be enhanced by 8 ps after PMD compensation with 1-dB optical signal-to-noise ratio （OSNR） penalty. Under the condition of fast change of states of polarization up to 85 rad/s in the fiber link, the performance of our PMD compensator undergoes the bit error ratio （BER） test for as long as 10 h.

关键词： Communication systems Digital signal processors Fiber optics Optical communication Optical systems Polarization Signal processing Signal to noise ratio

Record 50.7-Tbit/s WDM coherent transmission in hollow-core fiber

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2023年第9期66卷 2755-2756页

作者： ZHU BoWen WANG CaoYuan ZHU Jie WEI Yi DING JunJie ZHAI ZhenDe XIAO LiMin YU JianJun School of Information Science and Technology Fudan UniversityShanghai 200433China Shenzhen Sublime photonics Co. Ltd.Shenzhen 518109China

Over the past half-century, the emergence of technologies such as erbium-doped fiber amplifier(EDFA), wavelength division multiplexing(WDM), coherent transmission and advanced digital signal processing(DSP) has led to... 详细信息

关键词： fiber WDM amplifier

Recent Issues on Nonlinear Effects in Optical Fibers

在线全文

学校读者我要写书评

暂无评论

光学学报 2003年第S1期23卷 37-38页

作者： Takashi Inoue Osamu Aso Shu Namiki FITEL photonics Lab. Furukawa Electric Co. Ltd. 6 Yawata Kaigan Dori Ichihara Chiba 290-8555 JapanFITEL Photonics Lab. Furukawa Electric Co. Ltd. 6 Yawata Kaigan Dori Ichihara Chiba 290-8555 JapanFITEL Photonics Lab. Furukawa Electric Co. Ltd. 6 Yawata Kaigan Dori Ichihara Chiba 290-8555 Japan

This talk will discuss the types of optical signal degradation due to fiber nonlinearity and review recently invented fibers for suppressing the effects. It also introduces efficiency of highly nonlinear fibers and th... 详细信息

关键词： in high of that Recent Issues on Nonlinear Effects in Optical Fibers been for FWM XPM length on

photonics for net zero

在线全文

学校读者我要写书评

暂无评论

Advanced photonics 2022年第1期4卷 2-4页

作者： John R.Lincoln photonics Leadership Group and Harlin ltd. SalisburyUnited Kingdom

Achieving net zero will be the biggest technological challenge of the 21^(st)century.A truly global,all-pervasive challenge impacting every application,market,and *** are no guidelines,instructions,or silver bullets that provide overnight *** net zero will be a sum of countless innovations across energy generation,resource efficiency,and waste *** will have a pivotal role in all of these;directly,by reducing the carbon impact from using light-based technologies;and indirectly,through increased use of photonics in monitoring and reduction in greenhouse gasses across a vast range of industries.

关键词： technology silver photonics

Power Tapping Function in Near Infra-Red Region Based on 45°Tilted Fiber Gratings

在线全文

学校读者我要写书评

暂无评论

Optics and photonics Journal 2013年第2期3卷 158-162页

作者： Adedotun Adebayo Zhijun Yan Kaiming Zhou Lin Zhang Hongyan Fu David Robinson arden photonics ltd. Solihull UK Aston Institute of photonics Technology School of Engineering and Applied Science Aston University Birmingham UK Department of Electronic Engineering School of Information Science and Engineering Xiamen University Xiamen China

We report an efficient power tapping device working in near infra-red (800 nm) wavelength region based on UV-in- scribed 45° tilted fiber grating (45°-TFG) structure. Five 45°-TFGs were UV-inscribed in hydrogenated PS750 fiber using a custom-designed phase mask with different grating lengths of 3 mm, 5 mm, 9 mm, 12 mm and 15 mm, showing polarization dependent losses (PDLs) of 1 dB, 3 dB, 7 dB, 10 dB and 13 dB, respectively. The power side-tapping efficiency is clearly depending on the grating strength. It has been identified that the power tapping efficiency increases with the grating strength and deceases along the grating length. The side-tapped power profile has also been examined in azimuthal direction, showing a near-Gaussian distribution. These experimental results clearly demonstrated that 45°- TFGs may be used as in-fiber power tapping devices for applications requiring in-line signal monitoring.

关键词： Power Tapping Tilted Fiber Grating Polarization Dependent Loss In-Fiber Polarizer

Prediction-based dynamic routing intelligent algorithm in power optical communication network

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2022年第6期29卷 46-52页

作者： Guo Xuerang Li Feng Zhu Bohan Zhang Zhijun Guo Qingrui Yang Huiting Electric Power Research Institute State Grid Xinjiang Electric Power Co.Ltd.Urumqi 830000China State Key Laboratory of Information photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China Dispatching and Control Center State Grid Xinjiang Electric Power Co.Ltd.Urumqi 830000China

New energy power generation equipment has the characteristics of diurnal, perturbative, seasonal, and periodic power generation, which makes new power optical communication network(POCN) more dynamic and changeable. This is directly reflected in the dynamics of the link risk and service importance of the POCN. In this paper, aiming at the problem of the dynamic importance of service in POCN, and the resulting power optical communication network reliability decline problem, a new energy POCN dynamic routing intelligence algorithm based on service importance prediction is proposed. Based on the short-term power generation of new energy power station, the importance of each service and the risk degree of each link are predicted. Link weights are dynamically adjusted, and k-shortest path(KSP) algorithm is used to calculate route results. When network resources are insufficient, low-importance services can give way to prevent a large number of high-importance services from being blocked. Simulation results show that compared with the traditional KSP algorithm, the prediction-based dynamic routing intelligent(P-DRI) algorithm can reduce the service blocking probability by 55.59%, and reduce the average importance of blocking services by 44.77% at the cost of about 6.17% of the calculation delay.

关键词： new power optical communication network(POCN) traffic diversion new energy power generation network risk degree

High Signal-to-Noise Ratio Hall Devices with a 2D Structure of Dual δ-Doped GaAs/AlGaAs for Low Field Magnetometry

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2015年第12期32卷 167-170页

作者：陈笛赵柏秦张新 Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 Shangdong Wave of Huaguang photonics ltd dinan 250101

Single arid dual δ-doped GaAs/AlGaAs two-dimensional electron gas （2DEG） Hall devices for low magnetic field detection at room temperature are prepared. The sensitivity and noise spectrum of the Hall devices are measured for evaluating the signal-to-noise ratio performance. It is observed that the dual δ-doped Hall devices achieve a minimum detectable magnetic field as low as 303 n T, which is better than the single δ doped Hall device prepared under the same growth condition.

关键词： GALLIUM arsenide ALUMINUM gallium arsenide lasers SIGNAL-to-noise ratio DOPING profiles (Semiconductors) MAGNETOMETERS HALL effect MAGNETIC field effects