Browsing University of Hertfordshire by Author "Wright, Thomas"

Now showing items 1-3 of 3

    • Incoherent light in tapered graded-index fibre: a study of transmission and modal noise   

      Choochalerm, Piyamas; Martin, Bill; Jones, Hugh; Usher, Sarah; Wright, Thomas; Yerolatsitis, Stephanos (2023-01-30)
      We investigated the impact of taper length on light transmission through tapered graded-index fibres. We tested commercial fibres from Thorlabs and a custom graded-index fibre using both coherent and incoherent light ...

    • Mitigating Modal Noise in Multimode Circular Fibres by Optical Agitation using a Galvanometer 

      Ghosh, Supriyo; Boonsri, Chantira; Martin, William; Jones, Hugh R. A.; Choochalerm, Piyamas; Usher, Sarah; Yerolatsitis, Stephanos; Wocial, Thomas; Wright, Thomas (2024-01-02)
      Modal noise appears due to the non-uniform and unstable distribution of light intensity among the finite number of modes in multimode fibres. It is an important limiting factor in measuring radial velocity precisely by ...

    • Transmission properties of tapered optical fibres: Simulations and experimental measurements 

      Choochalerm, Piyamas; Martin, Bill; Jones, Hugh; Errmann, Ronny; Yerolatsitis, Stephanos; Wright, Thomas; Buisset, Christophe (2021-10-01)
      We measured the transmission of tapered and untapered optical fibres as a function of input beam numerical aperture at 635 nm. The tapered fibres were fabricated with an adiabatic tapering process from graded and step-index ...