Negative curvature fibres: exploiting the potential for novel optical sensors

C. C. Novo, A. Urich, D. Choudhury, R. Carter, D. P. Hand, R. R. Thomson, F. Yu, J. C. Knight, S. Brooks, S. McCulloch, J. D. Shephard

Research output: Chapter or section in a book/report/conference proceedingChapter in a published conference proceeding

6 Citations (SciVal)


One of the main challenges for fibre optic based sensing is robust operation in the mid-infrared (mid-IR) region. This is of major interest because this wavelength region is where the characteristic absorption spectra for a wide range of molecules lie. However, due to the high absorption of silica (above 2 μm), mid-IR sensors based on solid core silica fibres are not practical. Of the many alternatives to solid silica fibres, hollow core microstrutured optical fibres are being explored and show great promise. One relatively new fibre, the hollow core negative curvature fibre (NCF) is promising for novel optical devices due to the simple structure (in comparison to other microstructured fibres) in combination with a hollow core which enables low loss mid-IR infrared guidance in a silica based fibre. In this paper, an all silica NCF that is post-processed with a fs laser, in order to increase access to the hollow core, is presented with acceptable loss and significant potential for mid-IR gas sensing.

Original languageEnglish
Title of host publicationProceedings of SPIE (The International Society for Optical Engineering) 24th International Conference on Optical Fibre Sensors
EditorsH. Kalinowski, J. Fabris, W. J. Bock
ISBN (Print)9781628418392
Publication statusPublished - 30 Nov 2015
Event24th International Conference on Optical Fibre Sensors, OFS 2015 - Curitiba, Brazil
Duration: 28 Sept 20152 Oct 2015


Conference24th International Conference on Optical Fibre Sensors, OFS 2015


  • Femtosecond machining
  • Hollow core fibres
  • Infrared sensing
  • Microstructured optical fibres
  • Negative curvature fibre


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