Abstract
We report a fiber optic nanometer range position sensor based on reciprocal interferometry, a concept of import in interferometric fiber-optic gyroscopes. The configuration resembles a modified Michelson interferometer with only one of the two arms used. The principle of operation is the interference between the reflected light wave from the fiber end and that from a reflective object. As both the reference and the sensing light waves share a common optical path, the system is inherently insensitive to external perturbations by design. Our experimental results have shown the expected interference behavior, which agrees well with its mathematical simulation. A position sensing resolution of about 20 nm, which is limited by the choice of available components, has been demonstrated. The systems immunity to the influence of temperature change has also been verified.
| Original language | English |
|---|---|
| Pages (from-to) | 274-281 |
| Number of pages | 8 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3467 |
| DOIs | |
| Publication status | Published - 1998 |
| Externally published | Yes |
| Event | Far- and Near-Field Optics: Physics and Information Processing - San Diego, CA, United States Duration: Jul 23 1998 → Jul 24 1998 |
ASJC Scopus Subject Areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Keywords
- Displacement measurement
- Fiber optic sensor
- Interferometry
- Optical reciprocity
- Position sensor