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Publications

2025:

  1. James Jena, Francois Swanepoel, Gaathier Mahed, and David Waswa, “Simultaneous vibration and soil moisture sensing using a single mode fiber for structural health monitoring applications”, Applied Optics Vol. 64, Issue 9, pp. C74-C78 (2025). https://doi.org/10.1364/AO.546789
  2. Victor Chike Agbakoba, James Jena, David Waswa, Timothy Gibbon, Towards photonic innovation: a method of fabricating customizable compact optical fiber delay lines, Vol. 64, Issue 15, pp. 4271-4275 (2025) https://doi.org/10.1364/AO.546771
  3. W.K. Nyarangi, E.K. Rotich Kipnoo, F.W. Masinde, D.W. Waswa, J. Jena, Comparative analysis of different fiber types for strain sensing application under simulated mine conditions. Results in Optics 21 (2025)  https://doi.org/10.1016/j.rio.2025.100879
     
 

2024:

  1. James Jena , Gaathier Mahed, Tichakunda Chabata, Moctar Doucoure and Timothy Gibbon, “ Monitoring and early warning detection of collapse and subsidence sinkholes using an optical fibre seismic sensor” Cogent Engineering,  Vol. 11, No. 1, 2301152 2024 https://doi.org/10.1080/23311916.2023.2301152
  2. H.E. Aradi, EK Rotich Kipnoo, F.W. Masinde, D.W. Waswa, J. Jena, T.B. Gibbon, “All-optical wavelength reuse for meter reading application using EDFA saturation and DFB laser”, Optik, Vol. 11(1), 2301152  (2024) https://doi.org/10.1080/23311916.2023.2301152
  3. E. K. Rotich Kipnoo, F. W. Masinde, D. W. Waswa, J. Jena & T B. Gibbon “Simultaneous 10 Gbps data and clock transmission for smart power grid application utilizing the optical fibre and VCSEL technology”, Journal of Modern Optics, Vol 70(19–21), 1023–1030 (2024),  https://doi.org/10.1080/09500340.2024.2380732
 

2023: 

  1. R. S. Karembera, J. F. Jena, K. Nfanyana, and T. B. Gibbon, “Investigation of an underwater clock and data transmission optical wireless link at 650nm for robotic oriented geodesy applications” Optics Continuum Journal, Optics Continuum Vol. 2, Issue 1, pp. 78-89 (2023). https://doi.org/10.1364/OPTCON.475782
  2. Joshua Oladipo· Mathys C. du Plessis · Tim Gibbon, “Congestion aware ant colony optimisation algorithm for routing and spectrum assignment in flexi‐grid optical burst switching networks, Photon Netw Commun 45, 67–78 (2023). https://doi.org/10.1007/s11107-023-00993-3
  3. R. S. Karembera, J. F. Jena and T. B. Gibbon, “Astrophotonics-assisted 5G communication system within radio astronomy areas without introducing RFI effects”, Journal of Modern Optics, Vol. 70, No. 6, 327–338(2023) https://doi.org/10.1080/09500340.2023.2219780

2022:

  1. RS Karembera, K Nfanyana, GM Isoe, TB Gibbon, “Experimental investigation of VCSEL-based optical heterodyning with PAM 4 and envelop detection for 5G fronthaul systems", Journal of Modern Optics, vol. 69(2), pp. 72-81, 2022. 
  2. J Jena, S Wassin, TB Gibbon, “Dynamics of a bouncing table tennis ball from the acoustic signature using an optical fibre sensor", European Journal of Physics, vol 43(2), 025001. (11 pages), 2022.
  3. D Crichton, et al., TB Gibbon, et al. “The Hydrogen Intensity and Real-time Analysis eXperiment: 256-Element Array Status and Overview", Journal of Astronomical Telescopes, Instruments, and Systems, vol 8(1), 011019, 2022.
     

2021:

  1. Reinhard Karembera, Ketshabile Nfanyana, Tim Gibbon, “Simultaneous transmission of clock and data signals in photonic-assisted WDM passive optical networks”, J. Opt. Soc. Am. B, vol. 38, Issue 2, pp. 914-921, 2021.
  2. Reinhard Karembera, Tim Gibbon, “Effects of optical local oscillator power on the network bit error rate in optical heterodyning of comb lines from a gain-switched VCSEL comb”, Optics & Laser Technology, vol. 139, pp. 106-955, 2021.
  3. Reinhard Karembera, Tim Gibbon, “Coherent 16-QAM bidirectional fiber-wireless hybrid access network with optimal use of the optical local oscillator signal”, Optics Communications, vol. 501, pp. 127367, 2021.
  4. R.S. Karembera, K Nfanyana, GM Isoe, TB Gibbon, “Experimental Investigation of VCSEL-based Optical Heterodyning with PAM 4 and Envelop Detection for 5G Fronthaul Systems”,  Journal of Modern Optics, 2021.
 

2020:

  1. DM Osiemo, DW Waswa, KM Muguro, GM Isoe, TB Gibbon, AWR Leitch, “Modulated Raman Pump for Integrated VCSEL-based Reach Enhancement and Clock Tone Dissemination in optical Communication”, Optics Communications, vol. 459, pp. 124993, 2020.
  2. GM Isoe, RS Karembera, TB Gibbon, “Advanced VCSEL photonics: Multi-level PAM for spectral efficient 5G wireless transport network", Optics Communications, vol. 461, pp. 125273, 2020.
  3. GM Isoe, TB Gibbon, “Real-time wavelength routing based on Bragg reflection with integrated forward Raman for long-reach networks”, Optoelectronics Letters, vol. 16, pp. 40-44, 2020.
  4. S Wassin, TB Gibbon, “A proposed optical frequency synchronization system for the South African MeerKAT radio telescope”, Optical Fiber Technology, vol. 15, pp. 102164, 2020.
  5. GM Isoe, TB Gibbon, “Inherent EDFA cross-gain functionality for 17 Gbit/s PAM-3 all-optical wavelength reuse PON”, Optoelectronics Letters, vol. 16(2), pp. 122-125, 2020.
  6. GM Isoe, J Jena, RPM Julie, FB Kapp “Distributed SOP tracking fault detection technique for MeerKAT radio telescope array sub-metre single mode fibre link health monitoring”, Optics Communication, vol. 466, pp. 125673, 2020.
  7. J Jena, S Wassin, L Bezuidenhout, M Doucoure’, TB Gibbon, “Polarization-based optical fibre acoustic sensor for geological applications”, Journal of the Optical Society of America B, vol. 37 (11), pp. A147-A153, 2020.
  8. S Wassin, K Leburu, G Isoe, TB Gibbon, “Development of ultrastable fibre-optic time and frequency reference networks in Africa”, Journal of the Optical Society of America A, vol. 37 (11), pp. C57-C66, 2020.
  9. K Nfanyana, S Wassin, R Karembera, J Jena, TB Gibbon, “All-photonic 20-MHz clock for latency monitoring in a 5G network at 10 Gbps over optical fiber”, Journal of the Optical Society of America B, vol. 37 (11), pp. A202-A206, 2020.
  10. DM Osiemo, DW Waswa, KM Muguro, GM Isoe, TB Gibbon, AWR Leitch, “Frequency stability characterization: DFB laser and Raman pump performance on a distributed clock signal over 24.69 km fiber”, Journal of the Optical Society of America A, vol. 37 (11), pp. C95-C102, 2020.
  11. R Karembera, S Wassin, G Isoe, K Nfanyana, TB Gibbon, “All-optical flexible 5G signal generation and transmission for spectrum resource optimization”, Journal of the Optical Society of America B, vol. 37 (11), pp. A324-A330, 2020.
  12. R Karembera, C Censur, TB Gibbon, “A sub-60-GHz Power-efficient Fronthaul System Up to 16-Gbps Using RF Carriers Generated from a Gain-switched VCSEL”, OSA Continuum Journal (OSA), vol. 3 (12), pp. 3482-3496, 2020.
 

2019:

  1. D. Kiboi Boiyo, E.K. Rotich Kipnoo, T.B. Gibbon, “An integrated OADM based on Bragg trans-reflectance in 1550 nm VCSEL optical fibre access networks”, OPTIK, vol. 178, pp. 478-482, 2019.
  2. GM Isoe, AWR Leitch, TB Gibbon, “Maximizing capacity, flexibility and efficiency in G-PON networks using VCSEL-based OOK and 2/4-PAM formats”, Journal of Modern Optics, vol. 66(7), pp. 477-452, 2019.
  3. GM Isoe, AWR Leitch, TB Gibbon, “Simultaneous 45.2 Gbit/s 4-PAM data and 8 GHz reference frequency clock signal transmission over DWDM VCSEL channels for optical interconnects”, Optoelectronics Letters, vol. 15(1), pp. 48-51, 2019. 
  4. S Wassin, GM Isoe, AWR Leitch, TB Gibbon, "All-optical wavelength reservation for flexible spectrum networks using amplifier saturation and VCSEL injection," Optical Engineering 58(4), 046110, April 2019.
  5. GM Isoe, S Wassin, EK Rotich, AWR Leitch, TB Gibbon, “VCSEL-based Broadband Wavelength Converter for Ultra-Wideband Flexible Spectrum Data Routing in Optical Interconnects," Optical Fiber Technology, vol. 51, pp. 107-111, 2019. 
  6. S Wassin, GM Isoe, AWR Leitch, TB Gibbon, "Transmission of precise phase coherent optical signals using a VCSEL stabilization system," Optoelectronic Letters, vol. 15(3), pp. 0200-0203, 2019. 
  7. GM Isoe, EK Rotich, DK Boiyo, S Wassin, AWR Leitch, TB Gibbon, “All-optical wavelength reuse with simultaneous upstream data and PPS timing signal transfer for flexible optical access networks," Journal of Modern Optics, vol. 66(12), pp. 1305-1310, 2019. 
  8. PP Dlamini, GM Isoe, D Kiboi Boiyo, AWR Leitch, TB Gibbon, "All-Optical VCSEL-to-VCSEL Injection Based on Cross Gain Modulation for Routing in Multinode Flexible Spectrum Optimization in Optical Fibre Transmission Links," International Journal of Optics, vol. 2019, Article ID 2987652, 11 pages, 2019.
  9. GM Isoe, PP Dlamini, T.B. Gibbon, “Real-time wavelength reuse based on Bragg trans-reflection for dynamic reference frequency and data transfer in Datacom," Journal of Modern Optics, vol. 66(16), pp. 1631-1636, 2019.
  10. GM Isoe, DK Boiyo, TB Gibbon, “Dynamic O-band to C-band wideband wavelength converter for integrated VCSEL-based optical interconnects," Journal of Modern Optics, vol. 66(16), pp. 1637-1643, 2019. 
  11. GM Isoe, AWR Leitch, TB Gibbon, “Real-time 850 nm multimode VCSEL to 1550 nm single mode VCSEL data routing for optical interconnects," Optoelectronics Letters, vol. 15(4), pp. 297-301, 2019.
  12. GM Isoe, EK Rotich, TB Gibbon, “VCSEL-based Raman technology for extended reach time and reference frequency transfer systems," Optoelectronics Letters, vol. 15(2), pp. 139-143, 2019.
  13. GM Isoe, DK Boiyo, EK Rotich, DM Osiemo, TB Gibbon, “Integrated extended reach VCSEL Interconnect with 8.5 Gbps data modulated forward Raman pump signals", Journal of Modern Optics, vol. 66(19), pp. 1913-1919, 2019.
  14. GM Isoe, D Osiemo, DK Boiyo, EK Rotich, TB Gibbon, “Ultra-fast Optical Switch with Reconfigurable Wavelength Reuse Functionality for Dynamic Flexible Spectrum Networks", Journal of Modern Optics, vol. 66(20), pp. 1973-1978, 2019.
  15. D Kiboi Boiyo, GM Isoe, EK Kipnoo, TB Gibbon, “Bidirectional and Wavelength Unrestricted Conversion for Long–haul and Data Centre VCSEL Optical Fibre Interconnects”, Journal of Modern Optics, vol. 66(20), pp. 1979-1983, 2019.
  16. GM Isoe, S Wassin, TB Gibbon, "VCSEL Wavelength Reuse for Intrinsically Bidirectional Data Traffics in Next Generation GPONs", Optoelectronics Letters, vol. 15(5) pp. 360-362, 2019.
  17. EK Rotich, GM Isoe, D Kiboi Boiyo, S Kuja, DW Waswa, TB Gibbon, AWR Leitch, “All Optical Polarization-Based and DSP-Assisted Distributed Fiber Sensor for Earth Mass Movements Caused by Environmental Factors”, International Journal of Light and Electron Optics, vol. 206, pp. 163691, 2019.
  18. GM Isoe, S Wassin, EK Rotich Kipnoo, AWR Leitch, TB Gibbon, “VCSEL-based Differential Modulation Technique for High-speed Gigabit Passive Optical Networks”, Journal of Modern Optics vol. 66(4), pp. 419-423, 2019.
  19. GK Yegon, DW Waswa, GM Isoe, Arusei GK Kipkorir, RS Kipkoske, TB Gibbon, AWR Leitch, “20 Gbps Pulse Amplitude Modulation (PAM) Format for Capacity Upgrade in Optical Communications”, American Journal of Optics and Photonics, vol. 7(2), pp. 41-45, 2019.
 

2018:

  1. E. Nabadda, W.T. Ireeta, T.B. Gibbon, "Angular Displacement and SOP Speeds in Aerial and Buried Single Mode and Polarisation Maintaining Fibers", Optik, vol. 168, pp. 77-85, 2018.
  2. S. Wassin, G.M. Isoe, R. Gamatham, A.W.R. Leitch, and T.B. Gibbon, "Application of VCSELs in Next-generation Telescope Array Networks such as the Square Kilometre Array", Optics & Laser Technology, vol. 105, pp. 66-75, 2018.
  3. D. Kiboi Boiyo, T.B. Gibbon, E.K. Rotich Kipnoo, “A VCSEL-based Backbone Extended-Reach Optical Fibre Network: Supporting up to 10Gbps Flexible Access Networks for Africa", Optical Fiber Technology, vol. 43, pp. 126-130, 3, 2018.
  4. GM Isoe, AWR Leitch, TB Gibbon, “VCSEL Polarization Modulation for Pulse-Per-Second Clock Signal Transfer in Optical Frequency Distribution Systems”, Optoelectronics Letters, vol. 14 (5), pp. 376-379, 2018.
  5. GM Isoe, S Wassin, TB Gibbon, “'Multicast-Enabled High-Speed VCSEL Technology for Flexible Data Centre Networks”, Optoelectronics Letters, vol. 14(6), pp. 438-441, 2018.
  6. G.M. Isoe, S. Wassin, R. Gamatham, A.W.R. Leitch, and T.B. Gibbon, "60 Gbps 4-PAM VCSEL-based Raman Assisted Hyper-Scale Data Centre: In Context of Spectral Efficiency and Reach Extension", Optics Communications, vol. 428, pp. 164-168, 2018.
 

2017:

  1. G. M. Isoe, S. Wassin, R. Gamatham, A. Leitch, and T. Gibbon, "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", Journal of Modern Optics, vol. 64, (20), pp. 2245-2254, 2017.
  2. G. M. Isoe, S. Wassin, R. R. G. Gamatham, A. W. R. Leitch, and T. B. Gibbon, “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”, Journal of Modern Optics, vol. 64, (21), pp. 2336-2344, 2017.
  3. E. K. Rotich Kipnoo, D. Kiboi Boiyo, G. M. Isoe, T. V. Chabata, R. R. G. Gamatham, A. W. R. Leitch, T.B. Gibbon, "Demonstration of Raman-based, dispersion-managed VCSEL technology for fibre-to-the-hut application", Optical Fiber Technology, vol. 34, pp. 1-5, 3, 2017.
  4. D. Kiboi Boiyo, T. V. Chabata, E. K. Rotich Kipnoo, R. R. G. Gamatham, A.W.R. Leitch, T.B. Gibbon, "Reconfigurable high-speed optical fibre networks: Optical wavelength conversion and switching using VCSELs to eliminate channel collisions", Optical Fiber Technology, vol. 33, pp. 30-35, 2017.
  5. D. Kiboi Boiyo, E. K. Rotich Kipnoo, R. R. G. Gamatham, A.W.R. Leitch, T.B. Gibbon, "A signal impairment-aware scheme for next-gen flexible spectrum in 10 Gb/s metro-access optical fibre networks", Optical Switching and Networking, vol. 25, pp. 57-62, 2017.
  6. Gravett, A.S., du Plessis, M.C. & Gibbon, T.B., “A distributed ant-based algorithm for routing and wavelength assignment in an optical burst switching flexible spectrum network with transmission impairments”, Photonic Network Communications, 34(3), pp. 375-395, 2017.
  7. Enoch K. Rotich Kipnoo, Romeo R.G. Gamatham, Andrew W.R. Leitch, Timothy B. Gibbon, Sias Malan, Henno Kriel,; Francois Kapp, ”MeerKAT time and frequency reference optical network: Preliminary design analysis”, South African Journal of Science, vol.113 n.5-6 Pretoria May./Jun. 2017
  8. K. Grainge, B. Alachkar, Shaun Amy, D. Barbosa, M. Bommineni, P. Boven, R. Braddock, J. Davis, P. Diwakar, V. Francis, R. Gabrielczyk, R. Gamatham, S. Garrington, T. Gibbon, D. Gozzar et al. "Square Kilometre Array: The radio telescope of the XXI century", Astronomy Reports, vol. 61, issue 4, pp.288-296, April 2017
  9. Enoch K. Rotich Kipnoo, Romeo R. G. Gamatham, Andrew W. R. Leitch, and Tim B. Gibbon, "Simultaneous Signal Amplification and Clock Distribution Employing Backward Raman Pump over an Optical Fibre for Applications such as Square Kilometre Array", J. of Astron. Instrum. Vol. 06, Issue 03, 1750005 (1-6), Sept. 2017.
  10. E. K. Rotich Kipnoo, R.R.G. Gamatham, A.W.R. Leitch, T.B. Gibbon, R. Julie, R. Siebrits, S. Malan, H. Kriel and F. Kapp, "Polarization effects in KAT-7 telescope optical fibre network: Towards the distribution of frequency and timing references in the MeerKAT telescope", Elsevier Optik - International Journal for Light and Electron Optics, Volume 138, June 2017, Pages 50–54.





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