Low skew multimode ribbon fibres for parallel opticalcommunication

Siala, S.; Kanjamala, A.P.; Nottenburg, R.N.; Levi, A. F. J.

doi:10.1049/el:19941190

Cited by 16 publications

(6 citation statements)

References 4 publications

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“…The variation in optical pulse delay across the central 10 fibers is 110ps or 0.24ps / m . This value is more than 5 times lower than our previously reported results [4]. The low skew is due to correlation between the properties of the high quality fibers making up the ribbon.…”

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confidence: 66%

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Subpicosecond skew in multimode fibre ribbon forsynchronous datatransmission

Kanjamala

Levi

1995

Electron. Lett.

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contrasting

confidence: 66%

“…Recently we reported that interchannel skew in a fiber ribbon could be reduced to 1.25ps / m by forming each channel from fiber sequentially cut from the same pull [4]. In this letter we demonstrate a more than five-fold improvement in skew by selection of fiber with low modal dispersion and by controlling edge stress in the fiber ribbonization process.…”

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confidence: 75%

Subpicosecond skew in multimode fibre ribbon forsynchronous datatransmission

Kanjamala

Levi

1995

Electron. Lett.

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“…Fiber ribbons with about 1 ps/m skew have been developed, 15 which essentially increases the possible bandwidth-distance product. All the fibers in the same ribbon were sequentially cut to reduce the variation of refractive index among the fibers.…”

Section: Implementation Aspectsmentioning

confidence: 99%

“…In addition, the antenna is seen as one node ͑feeds the first node in the chain with data͒ and there is one master node responsible for supervising the whole system and interacting with the user. We denote the antenna as node m 1 , the modules shown in the figure as node m i , 2рiр14, and the master node as m 15 . The numbers of the modules are indicated in the figure also.…”

Section: Case Studymentioning

confidence: 99%

Two fiber-ribbon ring networks for parallel and distributed computing systems

Jönsson

1998

Opt. Eng

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Abstract. Ring networks made of fiber-ribbon point-to-point links are proposed. The first network is a control-channel based network in which one fiber in each link joins with others to form a control-channel ring. This ring improves performance of the network by sending medium access control information immediately before the data transmissions. High throughputs can be achieved in the network due to pipelining, i.e., several packets can travel through the network simultaneously but in different segments of the ring. The network can meet tough performance demands in, e.g., massively parallel signal processing systems, which is shown by example. Also, real-time demands can be met using slot reserving. The network, called CC-FPR (control-channel based fiberribbon pipeline ring), can be built today using off-the-shelf fiber optic components. The increasingly good price/performance ratio for fiberribbon links indicates a high potential for the success of the proposed kind of networks; a prototype is currently under development. The second network is similar to first except that it divides the network into two subnetworks, one for packet-switched traffic and one for circuit-switched traffic. When the main data flow in the network does not change rapidly, this is a good choice for a simple but powerful network.

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“…2 shows the POLO module mounted on an evaluation board. To test BER with worst-case crosstalk conditions, all 10 Tx and Rx channels of one module are connected in loopback mode with low-skew ribbon fiber [3]. A data generator is used to modulate all channels with independent PRES streams.…”

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POLO-parallel optical links for gigabyte/s data communications

Hahn

LEOS '95. IEEE Lasers and Electro-Optics Society 1995 Annual Meeting. 8th Annual Meeting. Conference Proceedings

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The goal of the POLO (Parallel Optical Link Organization) consortium is to develop low cost, high performance parallel optical links for computer clusters, switching systems, and multimedia. The members of the POLO consortium include Hewlett-Packard, AMP, DuPont and the University of Southern California. Because a clear price and performance advantage over electrical interconnects is required for the successful implementation of optical data buses in volume markets, the POLO program has chosen component and packaging technologies that are manufacturable and low cost. The components of the POLO module include VCSELs (verticalcavity surface emitting lasers), PolyguideTM polymer optical waveguides [ 11, PIN detector arrays, silicon bipolar transceiver ICs, and high-speed ceramic packages. The POLO module uses a duplex Polyguide-ribbon fiber connector for interface to ribbon 6 2 . m 25 multimode fiber. The POLO module accommodates 10-bit wide transmission and 10-bit wide receiver paths, allowing bidirectional transmission of 9 data + 1 clock or 10 data channels. Each channel operates at 622 Mb/s, although the perfonnance will be increased to 1 Gb/s per channel in future designs. An application platform to test the POLO module in a system environment will be provided by the development of an interface chip set for workstation interconnections.In this paper, the component and system results from the first generation POLO module will be presented. VCSELs, PTN detector arrays, and transceiver ICs were packaged and wirebonded to a high speed ceramic substrate. Polyguide waveguides [ 13 with 45' out-of-plane mirrors were packaged with MT-style ferrules to couple the transmitter and receiver arrays with the ribbon fiber. Highly efficient coupling with good uniformity is obtained between VCSELsRIN detectors and Polyguide waveguides, and the total link loss is typically < 5 dB. The reduced coherence VCSELs [2] operate at high data rates with IOW modal noise, RlN, jitter, and reflection sensitivity. Figure 1 shows the first generation POLO module design, and Fig. 2 shows the POLO module mounted on an evaluation board. To test BER with worst-case crosstalk conditions, all 10 Tx and Rx channels of one module are connected in loopback mode with low-skew ribbon fiber [3]. A data generator is used to modulate all channels with independent PRES streams. Figure 3 shows the eye patterns of the 10 channels in simultaneous operation at 622 Mb/s. The BER for each channel was < lo-", and an extended measurement of one channel resulted in BER < with 400 m of ribbon fiber.In conclusion, we have obtained successful operation of the 10-channel POLO module at 622 Mb/s per channel with up to 400 m of ribbon fiber. An overview of the present status of the POLO program will be given, including component performance, packaging approach, and system results. Our progress towards the development of the 2nd generation POLO module will also be discussed. POLO is funded in part by the Advanced Research Projects Agency. 228

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Low skew multimode ribbon fibres for parallel opticalcommunication

Cited by 16 publications

References 4 publications

Subpicosecond skew in multimode fibre ribbon forsynchronous datatransmission

Subpicosecond skew in multimode fibre ribbon forsynchronous datatransmission

Two fiber-ribbon ring networks for parallel and distributed computing systems

POLO-parallel optical links for gigabyte/s data communications

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