Thermally stable high-bandwidth graded-index polymer optical fiber

High-bandwidth poly (methyl methacrylate) PMMA base graded-index polymer optical fiber (GI POF) with high thermal stability is proposed. No distortion of bandwidth was observed even after more than 10000 hours aging at 85°C by selecting the large sized aromatic dopant which has a stable secondary interaction with PMMA matrix and maintains the high glass transition temperature (Tg) of the core of GI POF. The relationship between the heat-drawing condition from the GI preform to the fiber and the thermal stability in the attenuation was investigated. It was clarified that the length shrinkage of the fiber during the aging at high temperature caused large attenuation increase. On the other hand, the degree of shrinkage could be tightly controlled by changing the heat-drawing tension. It was confirmed that the GI POF drawn with optimized heat-drawing tension had no shrinkage of the fiber during aging at 70°C and no attenuation increase was observed     

Dye-doped step-index polymer optical fiber for broadband opticalamplification

We report the development of a novel and simple technique for fabricating polymer optical fibers of good optical quality for special device applications. This technique aims at polymer fibers doped with various functional organic materials. On the basis of the technique, step-index polymer optical fibers doped with laser dyes have been fabricated. High-gain and high-efficiency optical amplification has been achieved in a Rhodamine B-doped polymer fiber with a low pump power of less 1 kW and pulse width 5 ns. Because a high dye concentration is used, the optimal wavelength range of optical amplification in this fiber is significantly red-shifted toward the center of the communication window (at 650 nm wavelength) of methyl methacrylate-based polymer optical fiber. The shift is from the originally 560 and 590 nm to presently 610 to 640 nm. We also present experimental results that show good photostability of the Rhodamine B-doped polymer fiber, compared with those recently reported in the improved polymer material systems. From the experimental observation, we identified the thermally induced bleach of dye molecules as the major contributing factor to the lifetime of our material system     

聚合物光纤用氟树脂

分析了聚合物光纤对氟树脂的要求，详细介绍了七种氟树脂的性能及其加工工艺，这些氟树脂包括Teflon AF,THV,FEP氟化丙烯酸树脂，Cytop,F24 ,氟化聚碳酸酯。     

聚合物光纤用氟树脂(续前)

2.2　 THV氟塑料THV最初是由德国 Hoechst(赫思特 )公司于2 0世纪 80年代初开发的 ,其原商品名为Hostaflon TMTFB.X,1 993年 ,Hoechst公司将该技术和市场转让给美国 3M公司 ,其商品名改为 3MTMTHV,1 996年美国 3M公司和 Hoechst公司于 1 996年合资组成 Dyneon公司 ,因而该产品现称为 Dy-neon TMTHV。THV系列氟塑料主要是由四氟乙烯( TFE)、六氟丙烯 ( HFD)和偏氟乙烯 ( VDF)等采用乳液共聚法制备成的 [7] ,THV就是以这三种单体的第一个英文字母命名的。THV氟塑料同常规氟塑料有以下不同之处 :1 )它可熔融加工 ,加工温度…     

高带宽数据中心网络的动态光链接结构

信息传输对带宽的要求越来越高,采用密集波分复用等常规方法来提高系统容量会大大增加数据中心成本,针对这一问题提出了一种低成本、高带宽具有动态结构的光网络。分析结果表明,这种光网络可以适应未来通信模式的发展要求。     

POF在局域网中的应用

综合比较了各种局域网接入方式，介绍了国内外近期有关聚合物光纤局域网的研究成果。认为聚合物光纤在短距离光通信中具有成本与技术优势，特别在局域网与光纤入户中的应用潜力巨大。     

渐变折射率塑料光纤的研究动态

介绍了渐变折射率塑料光纤 (GI- POF)的传输性能、制造方法和应用 ,简述了国内GI- POF的研究动态和展望。     

Thermal tuning of polymer optical fiber Bragg gratings

Bragg gratings in polymethyl methacrylate (PMMA)-based polymer fibers were created and were tuned thermally. It is found that the tuning range is more than 18 nm over a temperature variation of 50°C. More importantly, no hysteresis effect was observed as the gratings were heated up and cooled down     

用于聚合物光纤的稀土离子配合物光谱特性研究

采用三种配体苯甲酰丙酮(BA)、苯甲酰三氟丙酮(BFA)、α-噻吩甲酰三氟丙酮(TTFA)与EuCl3和SmCl3合成了六种二元配合物Eu(TTFA)3,Eu(BA)3,Eu(BFA)3,Sm(TTFA)3,Sm(BA)3,Sm(BFA)3,通过测试比较其荧光光谱发现Eu(TTFA)3,Eu(BA)3,Eu(BFA)3在618nm处产生很强的荧光;Sm(TTFA)3,Sm(BA)3,Sm(BFA)3在650nm处有荧光峰产生;通过分析配合物和配体的能级关系,不同配体间发光效率的差异,不同稀土离子的发光特性的差异,发现了TTFA是Sm3 和Eu3 的优良配体,Eu3 具有较高的发光效率。在Sm3 和Eu3 的共掺杂中,选取TTFA做配体,发现Sm3 对Eu3 有明显的敏化效应。     

渐变型聚合物光纤研究进展

介绍了渐变型聚合物光纤(GIPOF)制作方法的进展，以及界面凝胶法制备的GIPOF的热稳定性全氟聚合物基GIPOF的最佳折射率分布及其色散性质，理论上全氟聚合物的损耗极限，差模衰减和模式耦合对GIPOF带宽的影响，最后介绍了一个综合各种影响因素的较完整的带宽预测模型。     

聚合物光纤光栅制备进展

聚合物光纤光栅不仅具有体积小、质量轻、柔软、成本低等诸多优点,还因聚合物自身的特性而具有灵敏度高、响应范围宽、生物兼容性等优良特性。首先梳理了聚合物光纤的光敏性机理,概述了聚合物光纤光栅制备的刻蚀光源和方法;其次根据聚合物光纤的组成材料,概述了多种聚合物光纤光栅的制备进展和性能指标,包括聚甲基丙烯酸甲酯、环烯烃共聚物TOPAS、透明无定物氟聚合物CYTOP和聚碳酸酯。总之,目前聚甲基丙烯酸甲酯聚合物光纤光栅的研究占主导,而基于新型材料的聚合物光纤光栅因自身独特的优势也逐渐受到重视。     

Analysis of graded-index polymer optical fiber link performance under fiber bending

Bending effects on bandwidth and loss of a graded-index polymer optical fiber (GI POF) were investigated, and those influences on the optical link performance were discussed simultaneously for the first time. The numerical apertures (NAs) of the GI POFs were deliberately varied from 0.154 to 0.292. A bending radius larger than 10 mm induced little mode coupling and little change in the bandwidth of the GI POF. A bending radius smaller than 10 mm caused degradation in the bandwidths of the higher NA GI POFs. On the other hand, in the lower NA GI POFs, even more severe bending could cause little change in their bandwidths. Thus, the lower NA GI POF seemed preferable in suppressing the bandwidth change. However, the higher NA GI POF exhibited the lower bending loss. The preferable NAs for both characteristics were completely opposite. Moreover, the bending loss under underfilled launch (UFL) could be lower than that under overfilled launch (OFL). On the other hand, the bending loss was equivalent to the bandwidth degradation in view of the link power penalty. Therefore, the bandwidth change and loss caused by the bending were the critical factors to optimize the optical link considering the link power budget. The high-NA GI POF with almost ideal refractive-index profile could provide stable high performance in overgigabit communication even under any bending conditions.     

基于聚合物光纤局域网系统的自由空间光通信

设计了与125 Mbps聚合物光纤局域网兼容的自由空间光通信系统,以实现楼宇间的数据通信,克服聚合物光纤传输距离较短的缺点.自由空间光通信包括发射和接收两个部分,发射部分由650 nm半导体激光器,驱动电路和准直扩束镜组成,接收部分由接收透镜和光电探测器组成.半导体激光器的调制发射功率为3 dBm,光电探测器的探测灵敏度为-27 dBm.分析了大气对光信号的衰减以及大气湍流造成的光斑抖动对通信的影响,记录了系统的信号传输波形和通信眼图.实验表明,自由空间光通信可以延长聚合物光纤局域网的通信距离,使其在实际工程中的应用更加灵活.     

塑料光缆的性能试验方法

文章首先介绍了梯度折射率塑料光纤的制造方法和性能;然后,阐述了塑料光纤光缆的性能试验方法和在梯度折射率塑料光纤上进行的数据传输试验的最新发展。     

High-bandwidth graded-index polymer optical fiber with high-temperature stability

A newly developed graded-index polymer optical fiber (GI-POF) with high-temperature and high-humidity stability was proposed. As it was found that the high numerical aperture and high glass transition temperature (T/sub g/) at the core center of the GI-POF were key issues to achieve both high-temperature and humidity stability, a partially fluorinated polymer material was adopted to obtain both characteristics in the GI-POF. The newly developed GI-POF had low-loss (140 dB/km at 650-nm wavelength), high-bandwidth (higher than 1 GHz for 100 m transmission), high-temperature and humidity stability at 70/spl deg/C, 80% relative humidity (R.H.) and low bending loss.     

Noise characteristic of dye-doped polymer optical fiber amplifiers

The noise in polymer optical amplifiers is mainly derived from the amplification of spontaneous emission （ASE）. ha this paper, the noise characteristic of dye-doped polymer optical fiber amplifiers is studied. The propagation equations of ASE power and the rate equations of dye molecular concentration are found based on the energy level transition of dye. The noise characteristic of optical fiber amplifiers is given by solving above equations numerically, and the relationship between noise figure and parameters of optical fiber amplifiers is investigated in detail. The result shows that the noise figure of dye-doped polymer optical fiber amplifiers will not exceed 5 dB.     

Fabrication process and optical properties of perdeuterated graded-index polymer optical fiber

We proposed a graded-index polymer optical fiber (GI-POF) enabling greater-than-gigabit data transmission in a short reach network by applying a two-step interfacial-gel polymerization process to a perdeuterated polymer material. Using this process, it is possible to fabricate a nearly optimum refractive-index profile with good reproducibility. In this paper, the preparation of a perdeuterated polymethyl methacrylate (PMMA-d8)-based GI-POF utilizing a PMMA cladding is described. This means that the low-loss PMMA-d8 material is used only for the core. Because the cladding transmits only a small fraction of the optical power, a low-loss material is not necessarily required for the cladding. It was verified that the low attenuation of the PMMA-d8 was maintained even if the cladding was composed of hydrogenated PMMA. As a result, a gigabit data transmission over 300 m was achieved by the PMMA-d8-core and PMMA-cladding GI-POF, which was impossible by the conventional PMMA-based GI-POF.     

新型大芯径塑料包层光纤

介绍了一种新型大芯径塑料包层光纤的研制和开发,作为适合工业、医疗、激光等领域应用的塑料包层光纤,拥有大的光纤芯层直径和高的数值孔径,能够提供非常便利和高效的耦合操作和效率.该光纤可使用在850nm窗口,通过对光纤几何、光学等性能的测试,能够满足应用所需要的光学参数.同时对塑料包层光纤的机械性能和温度稳定性能进行了全面的测试,保证了该光纤在实际使用过程中能够满足操作和使用寿命等工程应用的需求.     

微结构聚合物光纤套管法拉丝工艺

通过对微结构聚合物光纤拉丝工艺的研究,提出微结构聚合物光纤二次预制棒套管拉丝技术.为了降低光纤拉伸过程中微孔坍塌率,从光纤拉伸力和材料表面张力之间平衡的角度考虑,对拉丝炉中热区温度和长度进行控制,得到了预制棒拉丝炉和光纤拉丝炉中热区温度分布曲线.最后,通过对本体聚合法制备的椭圆芯六角对称微结构聚合物光纤预制棒的拉丝实践...     

Design of a polymer optical fiber luminescent solar concentrator

We present the design and optimization of a polymeric optical fiber luminescent solar concentrator (FLSC) and systematically investigate the impact of the geometrical and physical parameters of the fiber and active luminescent dopants on the FLSC performance. A multiplicity of individual FLSCs may be arranged on a surface to form a low‐weight and mechanically flexible solar concentrating fabric. In addition to these unique structural properties, we find that the overall optical‐to‐electrical conversion efficiency of the FLSC rivals that of reported flat slab LSCs while increasing the geometric gain, thereby potentially reducing the cost. Copyright © 2013 John Wiley & Sons, Ltd.