提高稀土掺杂光波导放大器增益的技术进展

稀土掺杂光波导放大器(RDWA)是继光纤放大器(RDFA)之后的新一代稀土掺杂光放大器,其更适用于未来光放大器集成化、小型化的要求,并且在降低成本方面优势明显。提高RDWA性能通常从提高稀土离子发光效率和降低波导损耗两个方面进行探究,这就要求更加合适的掺杂材料和高性能的波导结构,以及尽可能低的传输损耗。总结了稀土掺杂玻璃基、聚合物基、硅基及低损耗材料基质光波导放大器的研究进展,最后展望了本领域的发展前景。     

掺杂分布对多模光纤放大器输出特性的影响

针对高功率多模光纤放大器中稀土离子掺杂分布和形状对系统输出特性的影响,本文进行了数学模拟和理论分析.根据多模掺杂光纤速率方程考虑了种子光端面激励特性,并对纤芯模式耦合系数矩阵进行了修正,建立了多模光纤放大器理论模型.通过对功率传输方程组的求解,数值模拟了不同激励条件下6种均匀和抛物线形掺杂的双包层掺Yb3+光纤接入放大器的输出特性.计算结果证明:不同激励条件下,掺杂离子分布对输出特性的影响存在差异;通过设计光纤内掺杂离子分布规律和形状能有效抑制放大器中的高阶模式,提高输出光的光束质量.     

掺镨聚合物光纤的光辐射特性

制备了Pr(DBM)3Phen掺杂的聚合物光纤,研究了Pr(DBM)3Phen在聚甲基丙烯酸甲酯(PMMA)中的吸收光谱和荧光光谱.根据修正的Judd-Ofelt理论,用吸收光谱计算镨离子在PMMA中的强度参量:Ω2=46.334×10-20 cm2,Ω4=18.897×10-20 cm2,Ω6=1.610×10-20 cm2.用该参量计算镨离子(3P0、1D2)激发态的辐射寿命及各能级之间的辐射跃迁几率和荧光分支比,同时计算了(3P0→3F2、1D2→3H4)受激发射截面.分析表明,Pr(DBM)3Phen掺杂的聚合物光纤有望发展为聚合物光纤放大器和激光器.     

23mW 33dB光纤放大器模块的研究

报道了高功率掺饵光纤放大器模块的研制。它采用低掺杂Ｅｒ／Ｇｅ／Ａｌ光纤作为放大媒介并采用１．４８μｍ以向激光泵浦结构，模块小信号增益３３ｄＢ，最小噪声系数５．１ｄＢ最大输出功率２３ｍＷ。     

掺Pr^3＋硫（卤）系玻璃1.3μm光纤放大器

介绍了稀土掺杂光纤放大器的发展，总结了用于１．３μｍ光纤放大器的几种重要的硫系统质玻璃，阐述了接Ｐｒ＾３＋硫（卤）系玻璃１．３μｍ光纤放大器的光学性质并分析了－ＯＨ等杂质对其性能的影响。     

宽带碲基掺铒光纤放大器增益谱特性研究

建立了一个多信号共存情形下宽带碲基掺铒光纤放大器(EDTFA)四能级模型,系统研究了EDTFA 增益谱随着光纤激活长度、输入信号功率、泵浦功率和纤芯掺杂浓度的演变关系。研究表明,在输入信号功率减小、泵浦功率提高时,C 波段信号增益迅速增大;在光纤长度增长、掺杂浓度提高时,增益谱向 L 波段偏移;在小信号状态下,其 20dB 增益带宽大于 80nm。研究揭示了EDTFA 适合于作为 WDM 系统中的 L 波段和 C L 波段光纤放大器。     

分布式光纤拉曼放大器研制的进展

对分布式光纤拉曼放大器研究的历史、基本原理、优化设计以及现状和进展进行了讨论.对S波段的色散补偿型分布式光纤拉曼放大器以及采用光纤拉曼激光器作为抽运源,在前向抽运和后向抽运条件下,对5kmDCF-50kmG652光纤色散补偿型分布式光纤拉曼放大器增益光谱和噪声谱进行了研究.设计和制作了光纤光栅的增益平坦滤波器,取得了较好的增益平坦效果.FRA-1型分布式光纤拉曼放大器在校园网进行了应用试验,取得了较好的试验效果.     

聚合物光纤及其应用

本文综述国内外聚合物光纤的最新进展 ,介绍降低聚合物光纤损耗的氘化和氟化的方法 ,提出宽带的梯度折射率聚合物光纤 .分析聚合物的光学特性 ,报道功能聚合物光纤、聚合物光纤的无源和有源器件的研究 .     

带宽〉40nm的980nmLD泵浦掺Er^3＋光纤放大器模块

在国内首次用９８０ｎｍ激光二极管和参量优化Ｅｒ３＋／Ａｌ３＋共掺杂光纤研制成光学带宽＞４０ｎｍ的光电一体化光纤放大器实用型模块样机。模块净增益２５ｄＢ，饱和输出功率０ｄＢｍ，最大输出功率８ｄＢｍ，噪声系数＜５ｄＢ，可供波分复用光纤通信系统和光孤子传输实验试用。     

新疆电网光纤放大器运行现状浅谈

本文对新疆电网光纤放大器运行现状进行统计,从故障设备类型、故障线路及设备服役年限等三方面进行分析,不仅对故障及处理方法进行总结,更从现有运维工具及手段出发,对今后光纤放大器运维方案进行探讨,提出适用于新疆电网光纤放大器的运维思路。     

Fabrication and characterization of dye mixture doped polymer optical fiber as a broad wavelength optical amplifier

Rhodamine 6G and Rhodamine B dye mixture doped polymer optical fiber amplifier (POFA), which can operate in a broad wavelength region (60 nm), has been successfully fabricated and tested. Tunable operation of the amplifier over a broad wavelength region is achieved by mixing different ratios of the dyes. The dye doped POFA is pumped axially using 532 nm, 10 ns laser pulses from a frequency doubled Q-switched Nd: YAG laser and the signals are taken from an optical parametric oscillator. A maximum gain of 22.3 dB at 617 nm wavelength has been obtained for a 7 cm long dye mixture doped POFA. The effects of pump energy and length of the fiber on the performance of the fiber amplifier are also studied. There exists an optimum length for which the amplifier gain is at a maximum value.     

Quantum coherence effects in a Raman amplifier

We have studied optical pulse propagation in a Raman fiber amplifier doped with a three-level medium and driven by a control laser pulse. We analyze the spatial-temporal dynamics of pulse propagation for different atomic initial conditions. The propagation of an optical pulse through the amplifier can be sustained by a control laser that induces transparency via quantum coherence, which is useful for extending the distance between optical repeaters. Under certain conditions, amplification is achieved without population inversion. The results could be useful for laser control of optical pulses in amplifiers and waveguides.     

聚合物光纤梯度折射率测定方法和误差分析

研究了测量聚合物光纤径向折射率分布的相移干涉法,建立了数学模型,并采用数字模拟法进行了误差定量分析.     

Fiber Raman gain amplifier performance study using simple coupled-mode analysis

The propagation characteristics of doped fiber amplifier have, already, been analyzed using simple coupled-mode analysis (CMA), which steers the interests to apply this simple theory to study the amplification performance of fiber Raman gain amplifier (FRGA). But such study is yet to be done for FRGA. In this paper, a premier report based on CMA is presented to analyze and predict the performance of FRGA for first time, as per our knowledge, using coaxial structure consisting of step-index profiles in both inner and outer cores in terms of effective area, Raman gain coefficient, and effective Raman gain coefficient. In our investigation, we use single pump to compute and compare our results with the results obtained by involved matrix method and a fairly excellent match over a wide region of frequency shift is reported.     

Fabrication and characterization of dye-doped polymer optical fiber as a light amplifier

The fabrication and characterization of a Rhodamine 6G-doped polymer optical fiber amplifier have been carried out. Two different schemes were employed to characterize the optical fiber: the stripe illumination technique to study the fiber as a gain medium and another technique to study its performance as an amplifier. We observed a spectral narrowing from 42 to 7 nm when the pump energy was increased to 6 mJ in the stripe illumination geometry. A gain of 18 dB was obtained in the amplifier configuration. The effects of pump power and dye concentration on the performance of the fiber as an amplifier were also studied.     

实用型1.47μmLD泵浦掺Er~3+光纤放大器模块

在国内首次采用国产１．４７μｍ激光二极管和掺Ｅｒ３＋／Ａｌ３＋光纤研制成光电一体化的光纤放大器实用型模块样机。模块净增益２７ｄＢ，饱和输出功率０ｄＢｍ，最大输出功率７ｄＢｍ，光学带宽＞２０ｎｍ，噪声系数＜７ｄＢ，可供光纤通信和光孤子传输实验系统试用。     

非线性光学聚合物材料

非线性光学聚合物是一类新型的功能高分子材料，在光电子技术和集成光学等领域有广阔的应用前景，文中在介绍非线性光学效应和极化原理的基础上，综述了非线性光学聚合物材料研究现状及进展，着重阐述了掺杂型，功能型及共轭型等非线性光这聚合物的结构与性能，应用优势的存在的问题，并指出了这类材料的研究方向和发展趋势。     

Gain and noise figure enhancement of Er+3/Yb+3 co-doped fiber/Raman hybrid amplifier

An Er/Yb co-doped fiber/Raman hybrid amplifier (HA) is proposed and studied theoretically and analytically to improve the gain and noise figure of optical amplifiers. The calculations are performed under a uniform dopant and steady-state conditions. The initial energy transfer efficiency for Er/Yb co-doped fiber amplifier (EYDFA) is introduced, while the amplified spontaneous emission (ASE) is neglected. The glass fiber used for both Er/Yb and Raman amplifiers is phosphate. Different pump powers are used for both EYDFA and RA with 1 μW input signal power, 1 m length of Er/Yb amplifier and 25 km length of Raman amplifier (RA). The proposed model is validated for Er/Yb co-doped amplifier and Raman amplifier separately by comparing the calculating results with the experimental data. A high gain and low noise figure at 200 mW Raman pump power and 500 mW Er/Yb pump power are obtained for the proposed HA as compared with the experimental results of EYDFA, Raman amplifier and the EDFA/Raman hybrid amplifier.