Blar i NTNU Open på forfatter "Ballato, John"

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    • Net optical parametric gain in a submicron silicon core fiber pumped in the telecom band 

      Wu, Dong; Shen, Li; Ren, Haonan; Campling, Joseph; Hawkins, Thomas; Ballato, John; Gibson, Ursula; Peacock, Anna (Peer reviewed; Journal article, 2019)
      A silicon core fiber (SCF) has been designed and fabricated with a dispersion engineered profile to support broadband optical parametric amplification across the telecom window. The combination of low optical transmission ...

    • Nonlinear optical properties of polycrystalline silicon core fibers from telecom wavelengths into the mid-infrared spectral region 

      Ren, Haonan; Shen, Li; Wu, D; Aktas, Ozan; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula; Peacock, Anna (Journal article; Peer reviewed, 2019)
      Polycrystalline silicon core fibers (SCFs) fabricated via the molten core drawing (MCD) method are emerging as a flexible optoelectronic platform. Here, the optical transmission properties of MCD SCFs that have been tapered ...

    • Semiconductor core fibres: materials science in a bottle 

      Gibson, Ursula; Wei, Lei; Ballato, John (Peer reviewed; Journal article, 2021)
      Novel core fibers have a wide range of applications in optics, as sources, detectors and nonlinear response media. Optoelectronic, and even electronic device applications are now possible, due to the introduction of methods ...

    • Silicon Optical Fibres - Past, Present and Future 

      Peacock, Anna; Gibson, Ursula; Ballato, John (Journal article; Peer reviewed, 2016)
      This paper reviews the past, present and prospective future of silicon optical fibres. The incorporation of silicon with its rich optoelectronic functionality into existing glass fibre technologies presents a route to ...

    • Silicon-core glass fibres as microwire radial-junction solar cells 

      Martinsen, Fredrik A; Smeltzer, Benjamin; Nord, Magnus Kristofer; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula (Journal article; Peer reviewed, 2014)
      Vertically aligned radial-junction solar cell designs offer potential improvements over planar geometries, as carrier generation occurs close to the junction for all absorption depths, but most production methods still ...

    • Single crystal semiconductor-core optical fiber* 

      Wu, Wei; Song, Seunghan; Balci, Mustafa H.; Laurell, Fredrik; Cantwell, Patrick; Ballato, John; Gibson, Ursula (Journal article; Peer reviewed, 2019)
      Semiconductor-core fibers are improved by removal of grain boundaries. We use a CO2 laser to process silicon-based cores; an alloying element reduces both the temperature and speed required for formation of a single crystal.

    • Tapered silicon core fibers with nano-spikes for optical coupling via spliced silica fibers 

      Ren, Haonan; Aktas, Ozan; Franz, Yohann; Runge, Antoine; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula; Peacock, Anna (Journal article; Peer reviewed, 2017)
      Abstract: Reported here is the fabrication of tapered silicon core fibers possessing a nanospike input that facilitates their seamless splicing to conventional single mode fibers. A proofof-concept 30 µm cladding diameter ...

    • Wavelength conversion and supercontinuum generation in silicon optical fibers 

      Peacock, Anna; Campling, Joseph; Runge, Antoine; Ren, Haonan; Shen, Li; Aktas, Ozan; Horak, Peter; Healy, Noel; Gibson, Ursula; Ballato, John (Journal article, 2018)
      This paper describes the state of the art in wavelength conversion and supercontinuum generation using glass-clad silicon core optical fibers. Such semiconductor fibers have enjoyed considerable attention due to their ...