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Fiber Dispersion (fiber + dispersion)

Distribution by Scientific Domains

Polymers and Materials Science	25%

Selected Abstracts

Fiber breakage and dispersion in carbon-fiber-reinforced nylon 6/clay nanocomposites

JOURNAL OF APPLIED POLYMER SCIENCE, Issue 3 2007
Hu Zhou
Abstract In this paper, short carbon-fiber-reinforced nylon 6/clay nanocomposites are prepared via melt compounding, and fiber breakage and dispersion during processing are studied. The influences of clay and processing conditions on fiber breakage and dispersion are taken into consideration. It is found that the presence of organoclay can improve fiber dispersion, which is due to dispersion at the nanoscale of exfoliated clay sheets with large aspect ratio. The bimodal distribution of fiber length is observed in fiber-reinforced nanocomposites, which is similar to that in conventional fiber-reinforced composites. The improvement of fiber breakage at moderate organoclay loadings is also observed, which is ascribed to the rheological and lubricating effects induced by organoclay. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007 [source]

A dual continuous- and burst-mode clock recovery module utilizing fiber dispersion

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 8 2010
Minhui Yan
Abstract A clock recovery module suitable for both burst- and continuous-mode optical receiver utilizing fiber dispersion is experimentally demonstrated for the first time. The module utilizes the nonlinear characteristics of the received nonreturn-to-zero (NRZ) optical signals experiencing the fiber dispersion and the photo-detection to extract the clock information. Experiments demonstrated its functionality in both operation modes up to 9 Gbps. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1747,1750, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25347 [source]

Optical mm-wave generation based on phase modulation along with optical filtering

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 8 2007
Jianxin Ma
Abstract We have investigated the generation and transmission of optical millimeter (mm)-wave signal based on optical phase modulator (PM) and fiber Bragg grating (FBG) filter. With an optimized modulation depth of PM and a higher carrier suppression ratio via a notch filter, the generated optical mm-wave can be transmitted over a long-distance without fading. We have also theoretically analyzed the impact of time shift on the eye closure of optical and electrical signal due to the fiber dispersion, which is well in accord with the experimental results. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1787,1793, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22622 [source]

To extend delivery distance of the optical MM-wave generated by DSB modulation and vestigial sideband filtering

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 5 2006
Jianguo Yu
Abstract Due to RF fading effect caused by fiber dispersion in standard single-mode fiber (SSMF), the maximum delivery distance in SSMF for the optical millimeter (mm)-wave signals generated by the double-sideband modulation scheme is shorter than 2 km at a power penalty of 2 dB. We experimentally demonstrate that the maximum transmission distance can be largely extended after using vestigial sideband (VSB) filtering. When we use VSB filtering technique, the transmission distance for the mm-wave signals is extended more than 40 km at a power penalty of 2 dB. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1003,1004, 2006; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.21548 [source]

Effects of conductive fibers and processing conditions on the electromagnetic shielding effectiveness of injection molded composites

POLYMER COMPOSITES, Issue 6 2002
S. Y. Yang
This paper investigates the electromagnetic interference shielding effectiveness (EMI SE) of injection molded ABS disks filled with stainless steel fibers (SSF) and nickel-coated graphite fibers (NGF). The effects of fiber type, fiber length and weight percentage on SE were studied. Optical microscope (OM) and scanning electron microscopy (SEM) observations of the fiber distribution and dispersion were used to aid interpretation of the deviation on SE. The effects of processing conditions such as ring gate angles and injection speed on SE and fiber dispersions were also investigated. It is found that the SE of SSF filled disks is better than that of NGF with the same fiber length and weight percentage. The SEM shows that the SSF with severe twists connect with each other to form a three-dimensional network. Nevertheless, the NGF break into straight fragments, which make it difficult to form networks. With the same type of fiber (SSF), the critical concentration of 6mm was similar to that of 4mm. But the SE of 6mm is a little higher than that of 4mm. Minor improvements of SE values were obtained with expanded ring gate angles. Gate design and injection speed both change filling patterns. [source]

Impact of the delay ripple of cascaded gratings on dispersion compensation of long-haul fiber transmission systems

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 2 2004
Tigang Ning
Abstract Delay ripples of chirped-fiber Bragg grating (CFBG), which can compensate 200-km-long fiber's dispersion, is detailedly analyzed. A numerical simulation of the delay ripple of cascaded gratings is done using Schrödinger's equation and is compared with an experiment using a 1000-km transmission system over G.652 fiber by five groups of CFBGs for dispersion compensation. The research shows that the system degradation depends on the delay-ripple period, which is 0.01,0.1 nm, and its amplitude. Fluctuation of the power penalty, which depends on the CFBG's ripple period when the source wavelength is changed ±20 GHz around the CFBG's center wavelength, is experimentally studied. The theoretical results agree well with the experimental results. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 100,102, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20220 [source]