Search Results - "Gamatham, R R G"

The 1.28 GHz MeerKAT Galactic Center Mosaic by Heywood, I., Rammala, I., Camilo, F., Cotton, W. D., Yusef-Zadeh, F., Abbott, T. D., Adam, R. M., Adams, G., Aldera, M. A., Asad, K. M. B., Bauermeister, E. F., Bennett, T. G. H., Bester, H. L., Bode, W. A., Botha, D. H., Botha, A. G., Brederode, L. R. S., Buchner, S., Burger, J. P., Cheetham, T., de Villiers, D. I. L., Dikgale-Mahlakoana, M. A., du Toit, L. J., Esterhuyse, S. W. P., Fanaroff, B. L., February, S., Frank, B. S., Gamatham, R. R. G., Geyer, M., Goedhart, S., Gouws, M., Gumede, S. C., Hlakola, M. J., Hokwana, A., Hoosen, S. W., Horrell, J. M. G., Hugo, B., Isaacson, A. I., Józsa, G. I. G., Jonas, J. L., Joubert, A. F., Kapp, F. B., Kenyon, J. S., Kriek, N., Kriel, H., Krishnan, V. K., Liebenberg, D., Lord, R. T., Lunsky, B. M., Madisa, K., Mahgoub, O., Makhaba, A., Makhathini, S., Malan, J. A., Manley, J. R., Marais, S. J., Mauch, T., Merry, B. C., Millenaar, R. P., Mnyandu, N., Mokone, O. J., Monama, T. E., Mphego, M. C., New, W. S., Ngcebetsha, B., Ngoasheng, K. J., Ockards, M. T., Oozeer, N., Otto, A. J., Passmoor, S. S., Patel, A. A., Peens-Hough, A., Perkins, S. J., Ramaila, A. J. T., Ramanujam, N. M. R., Ramudzuli, Z. R., Robyntjies, A., Sambu, N., Schollar, C. T. G., Schwardt, L. C., Schwartz, R. L., Serylak, M., Siebrits, R., Sirothia, S. K., Smirnov, O. M., Sofeya, L., Taljaard, B., Tasse, C., Tiplady, A. J., Twum, S. N., van der Byl, A., van der Merwe, C., Van Tonder, V., Van Wyk, R., Venter, A. J., Venter, M., Wallace, B. H., Welz, M. G., Williams, L. P., Xaia, B.

“…Abstract The inner ∼200 pc region of the Galaxy contains a 4 million M ⊙ supermassive black hole (SMBH), significant quantities of molecular gas, and star…”
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Capacity upgrade in short-reach optical fibre networks: simultaneous 4-PAM 20 Gbps data and polarization-modulated PPS clock signal using a single VCSEL carrier by Isoe, G. M., Wassin, S., Gamatham, R. R. G., Leitch, A. W. R., Gibbon, T. B.

“…In this work, a four-level pulse amplitude modulation (4-PAM) format with a polarization-modulated pulse per second (PPS) clock signal using a single vertical…”
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A high capacity data centre network: simultaneous 4-PAM data at 20 Gbps and 2 GHz phase modulated RF clock signal over a single VCSEL carrier by Isoe, G. M., Wassin, S., Gamatham, R. R. G., Leitch, A. W. R., Gibbon, T. B.

“…Optical fibre communication technologies are playing important roles in data centre networks (DCNs). Techniques for increasing capacity and flexibility for the…”
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MeerKAT time and frequency reference optical network : preliminary design analysis by Kriel, Henno, Kipnoo, Enoch K. Rotich, Leitch, Andrew W.R., Gamatham, Romeo R.G., Malan, Sias, Kapp, Francois, Gibbon, Timothy B.

“…The MeerKAT telescope is a precursor to the Square Kilometre Array, which will rely on optical fibres to link the telescope receivers to a central processor…”
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The MeerKAT Telescope as a Pulsar Facility: System verification and early science results from MeerTime by Bailes, M, Jameson, A, Abbate, F, Barr, E. D, Bhat, N. D. R, Bondonneau, L, Burgay, M, Buchner, S. J, Camilo, F, Champion, D. J, Cognard, I, Demorest, P. B, Freire, P. C. C, Gautam, T, Geyer, M, Griessmeier, J. M, Guillemot, L, Hu, H, Jankowski, F, Johnston, S, Karastergiou, A, Karuppusamy, R, Kaur, D, Keith, M. J, Kramer, M, van Leeuwen, J, Lower, M. E, Maan, Y, McLaughlin, M. A, Meyers, B. W, Osłowski, S, Oswald, L. S, Parthasarathy, A, Pennucci, T, Posselt, B, Possenti, A, Ransom, S. M, Reardon, D. J, Ridolfi, A, Schollar, C. T. G, Serylak, M, Shaifullah, G, Shamohammadi, M, Shannon, R. M, Sobey, C, Song, X, Spiewak, R, Stairs, I. H, Stappers, B. W, van Straten, W, Szary, A, Theureau, G, Krishnan, V. Venkatraman, Weltevrede, P, Wex, N, Abbott, T. D, Adams, G. B, Burger, J. P, Gamatham, R. R. G, Gouws, M, Horn, D. M, Hugo, B, Joubert, A. F, Manley, J. R, McAlpine, K, Passmoor, S. S, Peens-Hough, A, Ramudzuli, Z. R, Rust, A, Salie, S, Schwardt, L. C, Siebrits, R, Van Tonder, G, Van Tonder, V, Welz, M. G

“…We describe system verification tests and early science results from the pulsar processor (PTUSE) developed for the newly-commissioned 64-dish SARAO MeerKAT…”
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Application of VCSELs in next-generation telescope array networks such as the Square Kilometre array by Wassin, Shukree, Isoe, G.M., Gamatham, R.R.G., Leitch, A.W.R., Gibbon, T.B.

“…•Ultra precise latency measurement.•Experimental results agrees with theoretical estimation.•2.8% measurement error between the experimentally theoretical…”
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Reconfigurable high-speed optical fibre networks: Optical wavelength conversion and switching using VCSELs to eliminate channel collisions by Boiyo, Duncan Kiboi, Chabata, T.V., Kipnoo, E.K. Rotich, Gamatham, R.R.G., Leitch, A.W.R., Gibbon, T.B.

“…•Crosstalk in 10Gb/s signals with 0.2–1.6dB penalties for 50–150GHz spacing.•A high‑speed 8.5Gb/s optical wavelength conversion using VCSELs at 1550nm…”
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Demonstration of Raman-based, dispersion-managed VCSEL technology for fibre-to-the-hut application by Rotich Kipnoo, E.K., Kiboi Boiyo, D., Isoe, G.M., Chabata, T.V., Gamatham, R.R.G., Leitch, A.W.R., Gibbon, T.B.

“…•Technology suitability and applicability to the African scenario.•Experimental demonstration of the relatively cheap VCSEL technology.•Error free…”
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Characterization of cross-polarization modulation on a two channel WDM system by Gamatham, R.R.G., Leitch, A.W.R.

“…This article contributes experimental corroboration of cross-polarization modulation (XPolM). A continuous wave probe signal is remotely controlled by a…”
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Signal monitoring and performance stability evaluation tool in a high speed optical communication network by Chabata, T.V., Boiyo, D. Kiboi, Kipnoo, E.K. Rotich, Gamatham, R.R.G., Leitch, A.W.R., Gibbon, T.B.

“…The diverse communication systems in South Africa have changed drastically over the last few years and are envisioned to continue to improve as evidenced by…”
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A signal impairment-aware scheme for next-gen flexible spectrum in 10 Gb/s VCSEL metro-access optical fibre networks by Boiyo, D. Kiboi, Kipnoo, E.K. Rotich, Gamatham, R.R.G., Leitch, A.W.R., Gibbon, T.B.

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Polarization effects in KAT-7 telescope optical fibre network: Towards the distribution of frequency and timing references in the MeerKAT telescope by Rotich Kipnoo, E.K., Gamatham, R.R.G., Leitch, A.W.R., Gibbon, T.B., Julie, R., Siebrits, R., Malan, S., Kriel, H., Kapp, F.

“…Polarization mode dispersion (PMD) is one of the key effects in optical fibre communication that distorts the transmitted signal. The effect of birefringence…”
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Noise figure and pump reflection power in SMF-reach optical fibre for raman amplification by Isoe, G. M., Rotich, E. K., Boiyo, D. K., Gamatham, R. R. G., Leitch, A. W. R., Gibbon, T. B., Muguro, K. M., Waswa, D. W.

“…We investigate both experimentally and by simulation the Noise Figure (NF) and pump reflection power of a Distributed Fibre Raman Amplifier (DFRA) as a…”
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Birefringence and polarization fluctuations as a result of optical fibre bending during scanning of a KAT-7 riser cable by Kourouma, H., Rotich, E., Gamatham, R. R. G., Leitch, A. W. R., Gibbon, T. B., Siebrits, R., Julie, R., Kapp, F.

“…We evaluate the effects of optical fibre bending on polarization mode dispersion (PMD) and states of polarization (SOP) for a KAT-7 dish antenna riser cable…”
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Effects of polarization mode dispersion (PMD) on Raman gain and PMD measurement using an optical fibre Raman amplifier by Boiyo, D. Kiboi, Kuja, S., Waswa, D., Amolo, G., Gamatham, R. R. G., Kipnoo, E. K. Rotich, Gibbon, T. B., Leitch, A. W. R.

“…We experimentally investigate the effects of increase of the differential group delay (DGD) on Raman gain and gain value. It was found that the increase of DGD…”
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