Browsing by Author "Huang, S. P."

Now showing 1 - 4 of 4

Bend and twist insensitive large core multimode fiber (LCMMF) for baseband and ROF in-home data transmission
(2013-05-01)
Chow, C. W.
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Yeh, C. H.
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Yang, L. G.
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Sung, J. Y.
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Huang, S. P.
To extend the fiber access network into the home, using optical fiber is a good choice. Bend and twist insensitive optical fiber with a large core diameter is particularly attractive, since it is easy to install and connectorize. However, its bandwidth will be severely limited by its large multimodal dispersion. Here, we first reported the design and fabrication of a novel bend and twist insensitive, 80-mu m core-diameter large-core multimode fiber (LCMMF) for in-home data communication. We experimentally demonstrated 10 Gb/s multiple bands data transmission at distances for residential buildings and data centers. The bit-error-rate (BER) performances of the LCMMF under bending and twisting were evaluated. Finally, we also discovered experimentally an important relation between the differential-mode-delay (DMD) and the BER of the fabricated LCMMF. This relationship could be a valuable tool for fiber manufacturers. (C) 2012 Elsevier B.V. All rights reserved.
Extended-reach access network with downstream radio-over-fiber (ROF) signal and upstream NRZ signal using orthogonal-WDM
(2012-07-16)
Chow, C. W.
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Huang, S. P.
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Yang, L. G.
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Yeh, C. H.
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光電工程學系
We propose and demonstrate an extended-reach radio-over-fiber (ROF) access network. The double-sideband carrier-suppressed (DSCS) optical signal carries the downstream ROF signal. A continuous wave (CW) optical carrier is embedded into the DSCS optical signal and transmitted to the colorless optical networking unit (ONU)/remote antenna unit (RAU) for the upstream signal generation. At the ONU/RAU, the upstream data is orthogonally wavelength division multiplexed (WDM) onto this CW carrier; hence mitigating the cross-talk generated by the downstream signal. Analyses about the optimum power difference between the downstream and the CW signals; as well as the split-ratio are also preformed. (C) 2012 Optical Society of America
Ring-Based WDM Access Network Providing Both Rayleigh Backscattering Noise Mitigation and Fiber-Fault Protection
(2012-10-15)
Yeh, C. H.
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Chow, C. W.
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Huang, S. P.
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Sung, J. Y.
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Liu, Y. L.
In this paper, we propose and investigate a ring-based wavelength-division-multiplexing passive optical network (WDM-PON) providing both Rayleigh backscattering (RB) noise mitigation and fiber-fault protection. The proposed ring-based WDM-PON has a dual-ring architecture to protect and restore any fiber fault. Besides, the ring architecture also can mitigate the RB beat noise, since the RB and the upstream wavelengths are propagating in opposite directions. Here, we discuss and analyze the characteristics of the downstream signals using 10 Gb/s ON-OFF keying (OOK), 10 Gb/s differential phase-shift keying, and 10 Gb/s orthogonal frequency-division multiplexing (OFDM) modulations, respectively. Moreover, we also investigate the upstream traffic using the 2.5 Gb/s OOK and 10 Gb/s OFDM generated by the directly modulated reflective semiconductor optical amplifier-based optical network unit, respectively.
Square-core single-mode-fiber (SC-SMF) with high bending tolerance for data center networks
(2015-08-15)
Chow, C. W.
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Huang, S. P.
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Yeh, C. H.
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Sung, J. Y.
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Liu, P. F.
Square-core optical fiber has been proposed recently for high optical power delivery in industrial processing tools with core size larger than 400 x 400 mu m(2). In this work, we first study the possibility of significantly reducing the core side to single-mode condition (i.e. 9 x 9 mu m(2)) at optical communication wavelength. In the proposed square-core single-mode-fiber (SC-SMF), high bandwidth-distance product and low bending loss are achieved. We also discuss the fabrication of the SC-SMF. After this, the bending losses of the SC-SMF and standard single mode fiber (SSMF) are analyzed and compared. Finally, 10 Gb/s signal transmission using conventional on-off keying (OOK) and orthogonal frequency division multiplexing (OFDM) passing through 200 m, 500 m and 1 km SC-SMFs are performed. Negligible power penalty is observed. We believe that this can be another choice of high bending tolerance fiber which is simple to manufacture. (C) 2015 Elsevier B.V. All rights reserved.