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1 edition of Fabrication of graded-index plastic optical fiber by the diffusion-assisted coextrusion method found in the catalog.

Fabrication of graded-index plastic optical fiber by the diffusion-assisted coextrusion method

by In-Sung Sohn

  • 334 Want to read
  • 24 Currently reading

Published .
Written in English


Edition Notes

Statementby In-Sung Sohn
The Physical Object
Paginationvii, 106 leaves :
Number of Pages106
ID Numbers
Open LibraryOL25912983M
OCLC/WorldCa49241292

  The designed deformation sensor contained an electric component, a mechanical system, and the bent fiber optic sensing element. A m length of fiber was bent into a loop and was mounted between 2 μm screws as illustrated in Fig. bending radius of the fiber equaled half the distance between the two walls, ranging from 25 to 50 mm. The above example has been for a germanosilicate fiber, i.e., a glass fiber. Similar designs, with typical core diameters being 50 μm and μm, are used for multimode telecom fibers in fiber-optic links with a transmission distance of a few hundred meters, for example. The fiber designs and high-precision fabrication techniques have been refined more and more for obtaining a minimum.

The attenuation of an optical fiber measures the amount of light lost between input and output. Total attenuation is the sum of all losses. Optical losses of a fiber are usually expressed in decibels per kilometer (dB/km).The expression is called the fiber’s attenuation coefficient α and the expression is. where P(z) is the optical power at a position z from the origin, P(0) is the power at. T1 - Fabrication process of graded-index polymer optical fiber prepared by co-extrusion process. AU - Kondo, Atsushi. AU - Asai, Makoto. AU - Hirose, Ryoma. AU - Ishigure, Takaaki. AU - Koike, Yasuhiro. PY - /12/1. Y1 - /12/1. N2 - Recentiy, GI-POFs were expected as the data-communication media for local area networks or home networks.

Basically, fiber manufacturers use two methods to fabricate multimode and single mode glass fibers. One method is vapor phase oxidation, and the other method is direct-melt process. In vapor phase oxidation, gaseous metal halide compounds, dopant material, and oxygen are oxidized (burned) to form a white silica powder (SiO2). Manufacturers call SiO2 the soot. Figure Some popular fiber sizes The transition of the optical parameters from the core to the cladding can be discontinuous (step-index fiber) or smooth (graded-index fiber). There are also lower-quality fibers available which have a glass core surrounded by a plastic cladding, as well as some all-plastic fibers. The latter.


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Fabrication of graded-index plastic optical fiber by the diffusion-assisted coextrusion method by In-Sung Sohn Download PDF EPUB FB2

High-Bandwidth Graded-Index Plastic Optical Fiber by the Dopant Diffusion Coextrusion Process. Journal of Lightwave Technology25, DOI: /JLT In-Sung Sohn, Chang-Won Park. Novel method for the fabrication of gradient-index plastic optical fibers.

AIChE Journal49 (10), DOI: /aic Cited by: 9. The graded-index plastic optical fiber (GI-POF) has been proposed as a solution. The conventional fabrication method of GI-POF, however, is unsuitable for mass production.

Recently, plastic optical fibers (POFs) have drawn significant attention as high-speed transmission media due to their advantages over conventional glass optical fibers such as flexibility and durability.

In addition, Grade-Index (GRIN) POFs with smoothly varying refractive indices provide increased data transmission speeds suitable for the short-distance communications such as local area. Request PDF | Diffusion-Assisted Coextrusion Process for the Fabrication of Graded-Index Plastic Optical Fibers | The diffusion-assisted coextrusion process is introduced as a method to fabricate.

A novel coextrusion method has been introduced for the fabrication of gradient-index plastic optical fibers (GI-POFs). In this method, the radial diffusion of a refractive-index-modifying dopant. The diffusion-assisted coextrusion process is introduced as a method to fabricate graded-index plastic optical fibers (GI-POFs).

In this process, two or more polymeric materials containing additives for refractive index modification are fed separately into a coextrusion die where a concentric multilayer structure is formed. Subsequently, the diffusion of additives takes place in a. Today, the number of services, which includes large information contents like high-definition movies, is rapidly increasing.

The graded-index plastic optical fiber (GI-POF) has been proposed as a solution. The conventional fabrication method of GI-POF, however, is unsuitable for mass production. Therefore, we propose the dopant diffusion coextrusion process for fabricating high-bandwidth GI-POF. High-Bandwidth Graded-Index Plastic Optical Fiber by the Dopant Diffusion Coextrusion Process Article (PDF Available) in Journal of Lightwave Technology 25(10).

A novel fabrication method of graded index polymer optical fibers (GI-POFs) called the "co-extrusion process" is proposed and demonstrated for first time.

This continuous fabrication process can reduce the fabrication cost of GI-POFs. Dopant diffusion temperature, dopant diffusion time, and the molecular weight of PMMA were optimized. An innovative fabrication method, coextrusion process, was developed for mass production of GI POFs [16–18].

In this process, the GI POF is directly fabricated from polymers, not from the GI preform. The polymers without dopants for the cladding and polymers containing low molecular weight dopants for the core are separately prepared. Venkatanarayanan, E.

Spain, in Comprehensive Materials Processing, Polymer Optical Fiber Sensors. Research in polymer optical fiber sensors (POFSs), also referred to as plastic optical fibers, remained stagnant until the s due to their high attenuation and lack of demand for specific commercial development of graded index plastic optic fibers by Prof.

Fabrication of graded-index plastic optical fiber by the diffusion-assisted coextrusion method. By In-Sung Sohn.

Abstract (Thesis) Thesis (Ph.D.)--University of Florida, (Bibliography) Includes bibliographical references (leaves )(Statement of Responsibility) by In-Sung Sohn.

The graded index plastic optical fiber (GI-POF) has been proposed as the transmission medium to realize high-speed information transmission. a GI-POF by the coextrusion process, a method that. In fiber optics, a graded index is an optical fiber whose core has a refractive index that decreases with increasing radial distance from the optical axis of the fiber.

Because parts of the core closer to the fiber axis have a higher refractive index than the parts near the cladding, light rays follow sinusoidal paths down the fiber.

The most common refractive index profile for a graded-index. We introduce a graded-index plastic optical fiber (GI POF) design for very short-distance household applications, in which the transmission quality is predominantly determined by system noise rather than the loss and bandwidth.

The developed GI POF has strong mode coupling with low accompanying scattering loss, which is closely related to the specific microscopic heterogeneities in the core.

Plastic optical fiber (POF) or polymer optical fibre is an optical fiber that is made out of r to glass optical fiber, POF transmits light (for illumination or data) through the core of the chief advantage over the glass product, other aspect being equal, is its robustness under bending and stretching.

This chapter emphasizes the nature of optical modes and their group velocities in step-index and graded-index fibers.

These topics are presented in Sets. andrespectively. The optical properties of the fiber material (which is usually fused silica). A graded-index plastic optical fiber (GI POF) has been proposed as the transmission medium to realize high-speed information transmission. We have succeeded in fabricating a GI POF by the dopant diffusion coextrusion process, a method that allows continuous fabrication of GI POF.

An alternate method for increasing the capacity of fiber optic communications systems is known as wavelength division multiplexing, or WDM. By this method, capacity can be increased by using more than one optical carrier (wavelength) on a single fiber.

This paper proposes the use of imperfected graded-index plastic optical fibers as sensing elements in deformation sensors. Use of a graded-index fiber instead of a step-index fiber for bending measurements resulted in an increase in sensitivity.

List the performance advantages of / μm multimode graded-index fibers. Identify the two basic types of single mode step-index fibers. Describe the vapor phase oxidation and direct-melt optical fiber fabrication procedures. Describe the fiber drawing process.

List the benefits of cabled optical .There are basically three types of optical fiber: single mode, multimode graded index, and multimode step index. They are characterized by the way light travels down the fiber and depend on both the wavelength of the light and the mechanical geometry of the fiber.

Examples of how they propagate light are shown in Figure 5. Figure 5.The sheathing process is where you apply the final touch to your loose tube fiber optic cable.

Mechanical properties for different cable types are set with armoring and strength members. Our state-of-the-art extrusion technology offers you the ability to utlize a large variety of plastic materials to produce high-quality jacketing.