J
John R. Macdonald
Researcher at Heriot-Watt University
Publications - 25
Citations - 617
John R. Macdonald is an academic researcher from Heriot-Watt University. The author has contributed to research in topics: Laser & Laser power scaling. The author has an hindex of 12, co-authored 25 publications receiving 577 citations.
Papers
More filters
Proceedings ArticleDOI
Experimental demonstration of 6-mode division multiplexed NG-PON2: Cost effective 40 Gbit/s/spatial-mode access based on 3D laser inscribed photonic lanterns
Rameez Asif,Hao Hu,Paul Mitchell,John R. Macdonald,Francesco Da Ros,Nicholas D. Psaila,Feihong Ye,Leif Katsuo Oxenløwe,Toshio Morioka +8 more
TL;DR: In this paper, the first space-division-multiplexed based symmetric NG-PON2 network by efficiently transmitting 40 Gbit/s/spatial mode was reported.
Proceedings ArticleDOI
SiN-assisted polarization-insensitive multicore fiber to silicon photonics interface
Giannis Poulopoulos,Dimitrios Kalavrouziotis,Paul Mitchell,John R. Macdonald,Paraskevas Bakopoulos,Hercules Avramopoulos +5 more
TL;DR: In this article, a polarization-insensitive coupler interfacing multicore-fiber (MCF) to silicon waveguides is demonstrated, which comprises a 3D glass fanout transforming the circular MCF core-arrangement to linear and performing initial tapering, followed by a spot-size-converter on the silicon chip.
ReportDOI
Ultrashort Pulse Inscription of Photonic Structures in ZnSe and GaAs for Mid Infrared Applications
Abstract: : Over the past year, channel waveguide technology in ZnSe and Cr2+: ZnSe has undergone major advancement from initial low loss guiding in the near-infrared to mid-infrared with single or multimode behaviour. These structures have been used in waveguide cavities and provided the first demonstration of a channel waveguide laser, paving the way to the development of high power, compact and robust Cr2+: ZnSe sources. Initial results of 5% slope efficiency and 18.5 mW outputs have already been improved by almost a factor of 3 to 14% and 43 mW and far greater performance is expected through waveguide optimisation and access to greater pump powers. Single pass amplifier internal gain has been measured at 3.4 dB with maximum performance only limited by the available pump power (1.2 Watts). The results contained in this report complete Phase 2 of the project with a number of successful outcomes, realising compact, channel waveguide sources in Cr2+: ZnSe. This sets solid foundations for the project to progress to Phase 3 and the development of high power, robust mid-infrared waveguide sources for real world applications.
Proceedings ArticleDOI
Ultrafast Laser Inscription of Waveguide Structures in Cr2+:ZnSe
TL;DR: In this paper, the waveguide structures were fabricated in chromium-doped zinc selenide (Cr2+:ZnSe) using ultrafast laser inscription, and the multi-scan fabrication technique was used.
Journal ArticleDOI
Angled 3D Glass-to-Silicon Photonics Coupling Interface
Giannis Poulopoulos,Dimitrios Kalavrouziotis,John R. Macdonald,Paul Mitchell,Nicholas D. Psaila,Hercules Avramopoulos +5 more
TL;DR: In this article, a 2° angled 3D glass waveguide and a thin-silicon-on-insulator platform flip-chip assembled in close proximity are used to construct a low-loss, low-cost, and low fabrication complexity 3D Glass-to-SiPh coupling interface.