通体发光光纤及其应用

通体发光光纤不仅具有导光性 ,而且具有通体发光特性。本文介绍了通体发光光纤的种类、制备方法及优越性能 ,并简单概述了通体发光光纤在照明、装饰装璜、广告及其它领域中的应用。     

塑料光纤的开发现状及应用趋势

塑料光纤的研究开发已有不少突破,其应用领域正在不断扩大。本文通过对塑料光纤的优越性、开发的种类和典型性质的介绍,以及对芯材高分子材料氘化、卤化、高纯化和拉丝均匀化等提高塑料光纤性能途径的论述,揭示塑料光纤的开发现状。在进一步讨论塑料光纤的应用之后,提出短距离通信是其最有前途的应用领域和我国开发塑料光纤的对策。     

用于短距离通信的塑料光纤技术

介绍了塑料光纤的开发历史和现状,从短距离通信的角度,介绍了聚甲基丙烯酸甲酯（ＰＭＭＡ）的塑料光纤,全氘化塑料光纤和全氟化塑料光纤的损耗,大数值孔径和小数值孔径阶跃型塑料光纤以及渐变型塑料光纤的带宽。另外,介绍了用于高速塑料光纤通信系统的光源和光检测器及其开发现状。     

塑料光纤材料的发展方向

在详细论述塑料光纤结构，材料性能，制造方法的基础上，介绍了塑料光纤的应用实例及其研究方向。     

塑料光纤的制备和应用

本文简要介绍了塑料光纤的特点、分类、制备方法和应用情况,并对其研究进展给予关注。     

深圳成功投产国内首批低损耗塑料光纤套装

在2007年9月宣布成功投产国内首批低损耗塑料光纤生产项目的深圳企业中技源专利城和深圳大圣光电技术有限公司,日前携手国际著名的塑料光纤以太网光模块制造公司,完成了百米百兆塑料光纤家庭系统集成套装的搭建工作和产品实验。     

高性能价格比的1×7混合棒塑料光纤耦合器的研究

提出了使用圆柱形混合棒的 1× 7塑料光纤耦合器 ,它直接使用粗塑料光纤制作混合棒 ,省略了加工难度大、成本高的混合棒拉锥过程 ,因而生产成本较低 ,但也带来了结构性的通道串音。研究了混合棒失配面外接U形光纤光吸收器以降低结构性通道串音的方法 ,制作了实验样品并进行了性能测量。测量结果表明 ,该耦合器的通道串音 <- 4 0dB ,其耦合效率与 1× 7圆锥形混合棒塑料光纤耦合器相同 ,附加损耗可以降至 1.7dB以下 ,该耦合器是一种高性能价格比的塑料光纤耦合器     

PMMA芯光纤侧面发光的制备及表征

选用破坏皮层的溶剂处理PMMA芯端发光光纤,获得所需要侧面发光光纤.通过对各种条件下处理得到的侧发光光纤的发光效果进行表征及分析,结果表明:MMA溶液以及正己烷与丙酮以体积比1:1混合溶液处理得到的侧发光效果较好,发光亮度呈指数衰减曲线.根据实验曲线给出了一个描述基于敏感系数、沿纤维轴向的长度、侧面发光系数等发光参数的基本模型,并利用双光源入射光纤来提高侧发光亮度.这种侧发光光纤的制备方法可应用于光纤可控发光织物及柔性织物显示器.     

高聚物光纤材料及制备方法

本文介绍了高聚物光纤（ＰＯＦ），特别是塑料光纤的基本理论，以及ＰＯＦ材料种类、合成与生产工艺，并提出将来的发展方向。     

太赫兹波段塑料光子晶体光纤的特性分析

本文利用有限元法对太赫兹波在塑料光子晶体光纤中的传输特性进行了模拟,分析了光纤结构与基模有效折射率、波导色散、基模有效面积的关系,给出了本文设计结构下,塑料光子晶体光纤的传输特性随空气孔径、孔间距等参数变化的规律。     

Prediction of light-transmission losses in plastic optical fibers

A theoretical expression is derived, based on a geometrical optics approach, with which to predict light-transmission losses in multimode plastic optical fibers for office or home lighting. Two types of optical ray arrangement, meridional ray and skew ray, are evaluated, and five loss mechanisms are identified and considered. The meridional arrangement results in a lower overall loss of light than the skew ray arrangement. The theoretical results were compared with experimental measurements taken for a 0.5-cm-diameter polymer optical fiber. For optical rays entering the fiber at incident angles of less than 20 degrees, the theoretical results are in good agreement with the empirical results.     

聚合物光纤用氟树脂材料性能特征

聚合物光纤POF用氟树脂材料首要的性能特征是具有低折射率、无定形、高透明特征,透光率以大于90%为佳,当氟树脂在POF中应用时要求同另一材料有匹配性要求:两者折射率相差0.03以上、膨胀系数及玻璃化温度相近;这种氟树脂不仅是优异的光纤皮材,而且是优异的光纤芯材.氟树脂用作POF芯材时,可降低POF的传输损耗,提高POF的耐温性、POF的传输带宽和POF的耐老化性能等,透明氟树脂是优异的POF芯皮材.     

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 .     

Numerical analysis of modal dispersion in graded-index plastic optical fibers

Modal dispersion properties of a fabricated plastic optical fiber are numerically calculated through a finite-element method. The modal index, group delay, impulse response, and output pulse shape are compared with those for the power-law profile plastic optical fiber; the influence of index profile deviations from the power-law profile is described. It is shown that index profile fluctuations in the actual index profile strongly affect the group delays, even though they are relatively small. On the other hand, they have little effect on the modal indices.     

高速列车内室照明舒适性设计研究

从广义的舒适性角度探讨高速列车内室照明设计,分析了照明与视觉特性的关系及影响视觉舒适性的因素,就色温、照度、照射方式和照明的空间布置对心理舒适性的影响进行了详细的论述,并从环境照明、局部照明、装饰照明3个方面总结了高速列车内室照明舒适性设计策略。     

Three-dimensional integral display using plastic optical fibers

A novel approach to an integral imaging system using a pliable plastic optical fiber array is proposed. The proposed system has the advantage that it can utilize a light source for three-dimensional (3D) images at an arbitrary location because the point light sources are formed by the plastic fiber array with flexible optical paths. Two-dimensional images can also be expressed in the proposed system. The light efficiency of this system is high compared with previous point light source array integral imaging systems. The feasibility of the proposed method is explained and demonstrated with experiments.     

Embedded fiber-optic Fabry-Perot ultrasound sensor

A fiber-optic ultrasound sensor is presented. The sensor consists of a continuous length of single-mode optical fiber with a built-in Fabry-Perot interferometer. The acoustic pressure produces changes in the index of refraction along the interferometer cavity through the strain-optic effect, thus modulating the reflected power of the light propagating in the fiber. The dielectric internal mirrors that form the interferometer are fabricated by joining a fiber coating with a TiO(2) film at one end to an uncoated fiber by electric arc fusion splicing. Experimental results have been obtained for sensors embedded in plastic and graphite composite materials, using ultrasound waves in the range from 100 kHz to 5 MHz. Values for the optical phase shift amplitude as large as 0.5 rad were obtained at an acoustic frequency of 200 kHz for a 1.1-cm-long interferometer embedded in plastic.     

Direct and chemically-mediated absorption spectroscopy usingoptical fiber instrumentation

This paper shows various applications of optical fiber sensors to absorption spectroscopy. Sensors for the monitoring of chromium in sewage water and for the colorimetry of gasoline samples are presented together with sensors for radiation dosimetry in radiotherapy and for lighting control in museum environments. In all these sensors, a combination of broadband and multi-band spectral measurements are collected using the same custom instrumentation unit consisting of LED light sources and an optical fiber microspectrometer. Extensions of the unit to implement other sensors making use of visible spectral range are discussed. The custom instrumentation implemented to address these sensors is their key unifying feature. It opens the possibility of addressing other sensors making use of absorption-based optrodes which present an analyte-modulated absorption spectrum in the visible spectral range     

考虑纤维初始位错的复合材料轴向压缩性能

通过试验及模拟对复合材料的轴向压缩失效过程进行了研究。试验中,采用高速摄像机对失效过程进行捕捉,并对最终破坏模式进行光学显微镜分析。基于纤维初始位错、纤维随机强度及基体Ducker-Prager塑性本构,通过有限元软件ABAQUS建立了复合材料轴向压缩的有限元模型,并对比分析剪切型及拉伸型两种不同初始位错模型的模拟结果。研究结果表明,复合材料轴向压缩包含弹性变形及塑性变形阶段,离散的纤维基体二维有限元模型能够有效模拟压缩的渐进损伤过程,且模拟结果与试验结果相吻合。复合材料轴向压缩强度是纤维初始位错及塑性基体剪切屈服共同作用的结果,其随着纤维初始位错幅值的减小、波长的增加及纤维体积分数的增加而增加。