Abstract
We report on a narrow band optical fiber filter utilizing a multimode fiber Bragg grating and fiber mode scrambler in order to tune its reflectivity that is useful as variable optical reflector and strain sensor. A change of reflectivity from 81% to 2% is achieved. We develop a novel fiber Bragg grating strain sensor that allows strain to be applied in the portion of the multimode fiber without grating. Particular advantages of this strain sensor are simple design, low system cost and high sensitivity. A strain sensitivity of 0.0013%/microstrain in change of reflectivity and large dynamic range (0-7,000 microstrain) are demonstrated. The strain sensitivity can be improved greatly by using efficient mode conversion structure in the device.
| Original language | English |
|---|---|
| Article number | 164 |
| Pages (from-to) | 671-674 |
| Number of pages | 4 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5855 PART II |
| DOIs | |
| Publication status | Published - 13 Dec 2005 |
| Externally published | Yes |
| Event | 17th International Conference on Optical Fibre Sensors, OFS-17 - Bruges, Belgium Duration: 23 May 2005 → 27 May 2005 |
Keywords
- Fiber Bragg grating (FBG)
- Mode scrambler
- Multimode fiber
- Strain
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics