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Control of temperature dependent viscosity for manufacturing of Bi-doped active fiber

International Journal of Extreme Manufacturing 2024年第3期6卷 522-530页

作者： Rui Duan Jingfei Chen Hao Ke Tianxia Wei Ke Zhang Xueliang Li Xu Feng Qiuju Zheng Zhixue He Jianrong Qiu Shifeng Zhou State Key Laboratory of Luminescent Materials and Devices School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesGuangzhou 510640People’s Republic of China School of Materials Science and Engineering Qilu University of TechnologyJinanPeople’s Republic of China Peng Cheng Laboratory Shenzhen 518000People’s Republic of China College of optical Science and Engineering State Key Laboratory of Modern Optical InstrumentationZhejiang UniversityHangzhou 310027People’s Republic of China

Bi-activated photonic materials are promising for various applications in high-capacity telecommunication,tunable laser,and advanced bioimaging and *** various Bi-doped material candidates have been explored,manufacturing of Bi heavily doped fiber with excellent optical activity remains a long-standing ***,a novel viscosity evolutional behavior mediated strategy for manufacturing of Bi-doped active fiber with high dopant solubility is *** intrinsic relation among the evolution of Bi,reaction temperature and viscosity of the glass system is ***,the effective avenue to prevent the undesired deactivation of Bi during fiber drawing by tuning the temperature dependent viscosity evolution is *** applying the strategy,for the first time we demonstrate the success in fabrication of heavily doped Bi active ***,the principal fiber amplifier device is constructed and broadband optical signal amplification is *** findings indicate the effectiveness of the proposed temperature dependent viscosity mediated strategy for developing novel photonic active fiber,and they also demonstrate the great potential for application in the next-generation high-capacity telecommunication system.

关键词： infrared luminescence active fiber optical amplification

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Fluorescence Emission Centres and the Corresponding Infrared Fluorescence Saturation in a Bismuth-Doped Silica Fibre

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Chinese Physics Letters 2008年第7期25卷 2527-2530页

作者：裘燕青沈永行 State Key Laboratory of Modern optical Instrument Zhejiang University Hangzhou 310027

We investigate the fluorescence characteristics of bismuth doped silica fibres with and without A1 co-dopant which are fabricated by means of modified chemical vapour deposition （MCVD） technique, and find that the fluorescences in the red region （centred around 750nm） and in the infrared region （centred around llOOnm） may originate from different emission sites in the fibre. Strong upconversion phenomena are observed in both Al-codoped and non A1 codoped bismuth fibres when the fibres are excited by an acoustic-optic Q-switched Nd：YVO4 laser. Both the aspects indicate that the upper energy level absorption reported in the work of the bismuth doped silica fibre lasers may result from the fluorescence emission sites that are not responsible for the infrared emission. It is thus expected that optimizing the compositions and the fabrication conditions of the fibre and then transferring more fluorescence emission centres are helpful for the infrared emission.

关键词： BROAD-BAND EMISSION optical amplification LASER GLASS LUMINESCENCE

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Near Infrared Broadband Emission from Bismuth-Dysprosium Codoped Chalcohalide Glasses

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Chinese Physics Letters 2007年第7期24卷 1958-1960页

作者：任晶陈丹平杨光许银生曾惠丹陈国荣 Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800

We investigate the broadband infrared emission of bismuth doped and bismuth/dysprosium codoped chalcohalide glasses. It is found that the bismuth/dysprosium codoping can drastically enhance the f/uorescence as compared with either bismuth or dysprosium doped glasses. Meanwhile, the full width at half maximum of bismuth/dysprosium codoped glasses is over 170 nm, which is the largest value among all the reported rare-earth doped chalcohalide g/asses. An ideal way for energy consumption between bismuth and dysprosium ions is supposed. Such improved gain spectra of both bismuth and dysprosium ions may have potential applications in developing broadband fibre amplifiers.

关键词： optical amplification ENERGY-TRANSFER LUMINESCENCE STATES

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Performance Enhancement of Praseodymium Doped Fiber Amplifiers

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Computers, Materials & Continua 2022年第12期73卷 5411-5422页

作者： Abdullah G.Alharbi Jawad Mirza Mehak Raza Salman Ghafoor Department of Electrical Engineering Faculty of EngineeringJouf UniversitySakaka42421Saudi Arabia SEECS Photonics Research Group Islamabad44000Pakistan Institute of Space Technology Islamabad44000Pakistan School of Electrical Engineering and Computer Science(SEECS) National University of Sciences and Technology(NUST)Islamabad44000Pakistan

In this paper,we report a simulation study on the performance enhancement of Praseodymium doped silica fiber amplifiers(PDFAs)in O-band(1270-1350 nm)in terms of small signal gain,power conversion efficiency(PCE),and output optical power by employing bidirectional *** PDFA performance is examined by optimizing the length of Praseodymium doped silica fiber(PDF),its mode-field diameter(MFD)and the concentration of Pr^(3+).A small-signal peak gain of 56.4 dB,power conversion efficiency(PCE)of 47%,and output optical power of around 1.6 W(32 dBm)is observed at optimized parameters for input signal wavelength of 1310 *** noise figure(NF)of 4.1 dB is observed at input signal wavelength of 1310 ***,the effect of varying the pump wavelength and pump power on output optical power of the amplifier and amplified spontaneous emission(ASE)noise is also investigated,***,the impact of ion-ion interaction(up-conversion effect)on small-signal gain of the amplifier is also studied by considering different values of up-conversion coefficient.

关键词： Praseodymium-doped fiber doped fiber amplifiers optical amplification mode field diameter noise figure

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Nonlinear Amplifying Loop Mirror for Reducing ASE in Nonsoliton Transmission

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The Journal of China Universities of Posts and Telecommunications 1996年第2期3卷 35-38页

作者： He Huajie Gu Wanyi Li Guorui and Xu Daxiong(Department of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100088, P. R. China) op.uky.edu Department of Telecommunication Engineering Beijing University of Posts and Telecommunications Beijing 100088 P. R. China

By using the optic amplifier in Nonlinear Amplifying Loop Mirror (NALM), the input power required to obtain nonlinear input-output relationship reduces to a level that nonsoliton pulse can reach. We use an accurate model to analyze the tralnsmissivity of NALM, and show that it has intensity-filtering character, and can be used to reduce ASE noise of signals amplified by cascaded optic amplifiers. We also find that the saturation of optic amplifier in the loop affects the behaviour of NALM dramatically.

关键词： s: nonlinearity nonsoliton transmission optical amplification ASE

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Investigation on the Infrared Luminescence from Bismuth-doped Borate Silicate Glasses

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Journal of Wuhan University of Technology(Materials Science) 2007年第B12期22卷 817-820页

作者：任进军邱建荣 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences Beijing 100080China State Key Laboratory of Silicon Materials Zhejiang University

Bismuth-doped borate silicate glasses were prepared by melt-quenching method. Glass samples as-prepared show broadband infrared luminescence covering wavelength range from 1 000 nm to 1 600 nm. The luminescence intensity can be sharply increased by removing OH content in the glass or increasing the melting temperature of the glass. The visible luminescence centered at 650 nm and the infrared luminescence has similar change tendency. They might come from the same luminescence centers that, we think, are the low valence state of bismuth.

关键词： luminescence optical amplification bismuth

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Application of ultra-long span optical transmission technology in Anhui Power Grid

Application of ultra-long span optical transmission technolo...

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2011 World Congress on Engineering and Technology(CET 2011)

Electric power system of long distance transmission requires constructing a large number of relay stations, and therefore bringing increasing investment costs, high maintenance difficulty, poor reliability and other problems. In order to resolving the problem, in accordance with actual situation of Anhui Power Grid, this paper puts forward a proposal of 10G system ultra-long span optical transmission that can achieve transmission 210km with no relay. The design uses currently mature optical amplification, by improving the luminous power of the transmitter and the sensitivity of the receiver and dispersion compensation for the dispersion problems that arise in the transmission process in order to achieve the ultra-long span transmission. The results of the test prove that the design’s indications are normal, and it improves the reliability of power grid.

关键词： electric power system ultra-long span optical transmission optical amplification design proposal.

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