Abstract
The deposition of an overlay of higher refractive index than the cladding in a Long Period Fiber Grating (LPFG) permits to improve the sensitivity to ambient refractive index changes in a great manner. The question is to obtain an optimum thickness value for the overlay. The problem is analysed with a numerical method based on LP mode approximation and coupled mode theory. Design rules are given for obtaining optimum sensitivity for specific ambient refractive index ranges.
| Original language | English |
|---|---|
| Article number | 206 |
| Pages (from-to) | 840-843 |
| Number of pages | 4 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5855 PART II |
| DOIs | |
| Publication status | Published - 2005 |
| Externally published | Yes |
| Event | 17th International Conference on Optical Fibre Sensors, OFS-17 - Bruges, Belgium Duration: 23 May 2005 → 27 May 2005 |
Keywords
- Coupled mode analysis
- Electrostatic self-assembly
- Nanosensors
- Refractometer