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 x 10(-6) are in principle detectable Crown Copyright
Original language | English |
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Pages (from-to) | 2358-2361 |
Number of pages | 4 |
Journal | Optics Communications |
Volume | 282 |
Issue number | 12 |
DOIs | |
Publication status | Published - 15 Jun 2009 |
Keywords
- Refractive index sensing
- Optical fiber characterization
- Tunable filters
- Long period gratings
- Photonic crystal fibers