Ultrasensitive UV-tunable grating in all-solid photonic bandgap fibers

J M Lazaro, B T Kuhlmey, Jonathan C Knight, J M Lopez-Higuera, B J Eggleton

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We study the shift of a long period grating's resonance wavelength with UV induced refractive index changes in an all-solid photonic bandgap fiber. A long period grating is mechanically imprinted in an all-solid photonic bandgap fiber with Germanium doped silica high-index rods in a lower-index silica background. The index of the high-index rods is modified through UV exposure, and we observe that the long period grating's resonance shifts with the bandgaps. With a sensitivity of 21,000 nanometers per refractive index unit and a 8.8 nm resonance width changes of refractive index of 3 x 10(-6) are in principle detectable Crown Copyright
Original languageEnglish
Pages (from-to)2358-2361
Number of pages4
JournalOptics Communications
Issue number12
Publication statusPublished - 15 Jun 2009


  • Refractive index sensing
  • Optical fiber characterization
  • Tunable filters
  • Long period gratings
  • Photonic crystal fibers


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