Abstract
In this paper we report the design and implementation of a multimode fiber sensing technique for displacement sensing. To exploit the spatial information contents for sensing, a multimode fiber specklegram sensor with a hetero-core fiber structure is used. The sensor utilizes the inner product of multimode fiber speckle fields, which is highly sensitive on the geometrical shape change of the sensing section. The sensitivity and the dynamic range of the displacement sensing are investigated for hetero-core structure fiber specklegram sensor and straight multimode fiber specklegram sensor. Itís found that the sensitivity of the hetero-core FSS offers sensitivity as high as 0.1 μm, with a dynamic range of about 3 μm, which is superior to straight structure multimode fiber FSS. Dynamic response of the hetero-core FSS for displacement sensing was also studied.
| Original language | English (US) |
|---|---|
| Article number | 23 |
| Pages (from-to) | 164-172 |
| Number of pages | 9 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5560 |
| DOIs | |
| State | Published - 2004 |
| Externally published | Yes |
| Event | Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X - Denver, CO, United States Duration: Aug 2 2004 → Aug 3 2004 |
Keywords
- Displacement sensing
- Fiber sensing
- Fiber specklegram
- Hetero-core fiber
- Multispeckle pattern
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering