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.
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Journal ArticleDOI
Ultrafast laser inscription: perspectives on future integrated applications
TL;DR: This paper reviews the recent advancements achieved using ultrafast laser inscription (ULI) that highlight the cross-disciplinary potential of the technology and focuses on two key emergent technologies driven by ULI processes.
Journal ArticleDOI
Ultrafast laser inscription of near-infrared waveguides in polycrystalline ZnSe.
John R. Macdonald,Robert R. Thomson,Stephen J. Beecher,Nicholas D. Psaila,Henry T. Bookey,Ajoy K. Kar +5 more
TL;DR: The successful fabrication of a low-loss near-IR waveguide in polycrystalline ZnSe using ultrafast laser inscription is reported, which supported a well-confined mode at 1.55 μm.
Journal ArticleDOI
Efficient mid-infrared Cr:ZnSe channel waveguide laser operating at 2486 nm.
John R. Macdonald,Stephen J. Beecher,Patrick A. Berry,G. Brown,Kenneth L. Schepler,Ajoy K. Kar +5 more
TL;DR: A Cr:ZnSe channel waveguide laser operating at 2486 nm is reported and a maximum power output of 285 mW is achieved and slope efficiencies as high as 45% are demonstrated.
Journal ArticleDOI
Compact mid-infrared Cr:ZnSe channel waveguide laser
TL;DR: In this paper, a mid-infrared channel waveguide laser in Cr:ZnSe operating at 2573 nm was demonstrated. But the design of the depressed index cladding structures guide across the entire emission band.
Journal ArticleDOI
Direct laser writing of near-IR step-index buried channel waveguides in rare earth doped YAG.
Airan Rodenas,Antonio Benayas,John R. Macdonald,Jian Zhang,Dingyuan Tang,Daniel Jaque,Ajoy K. Kar +6 more
TL;DR: A new (to the authors' knowledge) ultrashort laser pulse irradiation regime that allows us to directly modify and increase the refractive index of rare earth doped YAG polycrystalline ceramics has been identified.