光纤预制棒制造设备控制系统

本文以MVCD制造设备控制系统为研究对象，采用单片机为处理芯片的控制系统设计方案。介绍了制造设备控制系统整体设计，具体说明了硬件设计的基本原理和方法，包括微处理器模块、过程通道模块以及人机接口模块设计等。设计了控制系统的应用程序，应用了模糊控制理论对模管进气端和出气端的压力差进行控制，减少了控制系统振荡，获得了较好的效果。     

我国光纤预制棒及相关材料产业的最新发展状况

１前言光纤预制棒（简称光棒）被业界誉为光通信产业“皇冠上的明珠”。光缆的关键是光纤，而光纤的母体和瓶颈又是光棒。在光缆行业中，光纤预制棒、光纤、光缆所占整个行业链的利润之比为7：2：1，生产光纤预制棒的利润远远超过生产光纤和光缆的利润。目前，全世界生产光缆的厂商有数百家之多，而主要的光纤拉丝厂只有十几家，但有能力提供预制棒的企业却仅有几家，因此，光纤预制棒的生产是光纤产业的瓶颈。制造光棒的主要技术掌握在少数发达国家手中，对外实行技术封锁，迫使没有掌握这些技术的国家必须付出高额费用去购买光棒用于生产…     

基于PCVD光纤预制棒微波系统的仿真与应用

随着5G、云计算、数据中心等概念的提出,对光纤技术不仅提出了量的需求,也要求光纤技术发展需满足新应用的需求.光纤装备技术是光纤技术的基石,其中采用等离子体装备技术可以实现多种大容量新型光纤技术的开发,具有广泛的应用前景和重大的研究价值.本文通过相关仿真,设计出了一种基于等离子化学气相沉积(PCVD)光纤预制棒微波系统的...     

光纤预制棒中元素的线分析定量化方法

采用电子探针显微分析法对光纤预制棒进行元素线分析定量化,光纤预制棒心部Yb和Al等元素的含量较低、基体效应的复杂影响以及测试条件的差异等因素导致线分析定量化结果误差较大。采用多点法的测试结果对光纤预制棒中Yb、Al元素的线分析定量化结果进行校正。结果表明：在两点法的基础上引入修正因子,可以简化测试过程,快速、准确地得到元素线分析定量化结果。     

我国业已掌握了多种光纤预制棒芯棒核心技术

据报导，“十五”国家科技攻关计划“PCVD大尺寸低水峰单模光纤预制棒制造工艺技术开发”和“全合成光纤预制棒产业化技术”课题日前通过了专家验收。开发大尺寸光纤预制棒制备工艺，可减少多根预制棒的头尾损耗，减少运输和安装等非必要工时，增加连续生产时间，提高原材料利用效率，有效降低生产成本。     

聚合物光纤光谱损耗特性的研究

截断法测量聚合物光纤 ( POF)的光谱特性是研究其损耗的一种有效方法 .用平面光栅单色仪对聚合物光纤聚甲基丙烯酸甲酯 ( PMMA)和聚苯乙烯 ( PS)的损耗光谱进行了测量 ,结果 PMMA芯 POF有三个传输窗口 ,分别为 5 2 0 nm,5 74nm,65 0 nm.在 5 2 0 nm,5 74nm处的损耗较小 ,且特性较为平坦 ,有很好的应用前景 . PS芯 POF窗口分别为 5 5 0 nm,5 80 nm,63 0 nm,670 nm,73 3 nm和 780 nm.在 5 5 0 nm,5 80 nm处同样有较好的应用前景     

住友电工携手富通集团在杭州富阳打造光纤及预制棒产业基地

10月16日下午,富通集团与世界500强企业——住友电气工业株式会社合资项目签约仪式在杭举行。双方的合资项目涵盖光纤、光缆和光纤预制棒产品领域,地域覆盖杭州、成都、深圳、香港四地,其核心是在富阳投资1．45亿美元,打造面向全球、最具竞争力的光纤及光纤预制棒产业基地。     

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 .     

油酸掺杂制备尺寸可控聚苯胺微米棒及其性能研究

以苯胺为单体、油酸为掺杂酸、过硫酸铵为氧化剂,通过软模板聚合法制备了油酸掺杂聚苯胺导电材料.利用扫描电镜观察发现,通过调节苯胺与油酸的浓度可制备不同直径的聚苯胺微米棒,其直径约为200～390nm.利用红外分析对不同浓度比例下所得产物的化学结构进行表征发现,随着油酸掺量的增加,在2924cm-1和2853cm-1(vc-H)处的吸收峰强度也增加.利用XRD分析了产物的晶型结构.此外,对产物的电导率、溶解性也进行了测试与评价.     

Birefringence relaxation in photosensitive polymer optical fiber preform

The birefringence relaxation of photosensitive polymer optical fiber preform with low azo concentration is analyzed. Instead of bi-exponential function, tri-exponential one is introduced to describe the relaxation process. Three types of relaxation are given considering the movements of chromophores, side chains, and main chains. The conserved birefringence, which depends on the orientation of main chains, is also studied through comparison of three kinds of materials with different interaction between side chain and main chain.     

Fabrication of a graded-index polymer optical fiber preform without a cavity by inclusion of an additional monomer under a centrifugal force field

When two or more monomers with different densities and refractive indices are polymerized under a centrifugal force field, a radially varying refractive index is generated owing to the difference in density of the monomers. After the polymerization is completed, a cavity is generated about the rotational axis as a result of inherent volume shrinkage during bulk radical polymerization. Therefore it is necessary to feed an additional monomer into the cavity to compensate for the undesirable volume shrinkage. We have successfully fabricated a preform with graded indices for polymer optical fiber without a cavity by adding another monomer during rotation of the reactor. One can control the overall refractive-index profile by changing the rotation speed. Furthermore, the refractive-index profile can be predicted as a function of rotating speed by use of a simple mathematical model.     

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.     

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.     

光棒废料中提取的白炭黑的疏水化改性

为找出光纤预制棒废料中提取的白炭黑的改性效果好的硅烷偶联剂,用KH-560、KH-151、KH-171、KH-602和CG-551等10种硅烷偶联剂对该白炭黑进行改性。白炭黑在140℃下活化20 h,将活化的白炭黑3 g分别与10种不同的偶联剂0.3 m L在45 m L二甲苯溶剂中130℃加热搅拌13 h,离心分离后,固体样品加适量的无水乙醇洗涤烘干后即得到改性的白炭黑。改性后样品的沉降性、亲油化度、表面羟基数等实验结果表明,10种硅烷偶联剂都能对白炭黑进行改性,其中KH-560、CG-8030、KH-151、KH-171、KH-172、KH-570对白炭黑的改性效果优于含氨基或巯基的KH-602、KH-792、CG-551、KH-550等。     

Graded-index polymer optical fiber for high-speed data communication

We successfully obtained a high-bandwidth (1 GHz km) and low-loss (90 dB/km at 0.572 μm of wavelength) graded-index polymer optical fiber by using the interfacial-gel polymerization technique, in which we used an unreactive component to obtain the quadratic refractive-index distribution. This high-bandwidth graded-index polymer optical fiber makes it possible to transmit a high-speed optical signal in a short-range network, which is not possible when we use the step-index type of polymer optical fiber commercially available.     

Fabrication and modeling of uniform-waist single-mode tapered optical fiber sensors

We report the fabrication and modeling of single-mode tapered optical fiber sensors. The fabrication technique consist of stretching a section of fiber with an oscillating flame torch. Such a process allows controllable fabrication of lossless tapered fibers with a uniform waist. The sensor transmittance is modeled with a simple ray optics approach. In the model, all the taper parameters are taken into account. Our results indicate that sensor sensitivity can be adjusted with the taper waist diameter. As an example a gold-coated tapered fiber is theoretically and experimentally analyzed.