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Ultrasensitive UV-tunable grating in all-solid photonic bandgap fibers |
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| Authors: | JM Lázaro BT Kuhlmey JC Knight BJ Eggleton |
| Institution: | a Grupo de Ingeniería Fotónica, Dpto. TEISA, Universidad de Cantabria, Avda. Castros S/N, 39005 Santander, Spain b Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS) and Institute of Photonics and Optical Science, School of Physics, The University of Sydney, New South Wales 2006, Australia c Centre for Photonic and Photonics Materials, Department of Physics, University of Bath, Bath BA2 7AY, UK |
| Abstract: | 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 × 10−6 are in principle detectable |
| Keywords: | 42 70 Qs 42 81 Pa 42 79 Dj |
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