Abstract
In this paper, we report a Sagnac interferometer based velocimeter with a resolution of 0.3 μm/s. The sensor is constructed from commercially available telecommunication single mode fibers. A sensing probe is inserted on one side of the Sagnac loop to illuminate a test surface and to couple light back to the coil. Nonreciprocal phase shift appears between the counter-propagating waves when the surface is moving away or towards the sensing probe. A number of signal-to-noise-ratio enhancing techniques have been employed and a nanopositioner is also used to provide a known velocity to test the sensor response. Our experimental results have shown a linear relationship between the applied velocity and the sensor response within the nanopositioner restricted measurement range of 20 μm/s.
| Original language | English |
|---|---|
| Pages (from-to) | 597-604 |
| Number of pages | 8 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3897 |
| Publication status | Published - 1999 |
| Externally published | Yes |
| Event | Proceedings of the 1999 Advanced Photonic Sensors and Applications - Singapore, Singapore Duration: Nov 30 1999 → Dec 3 1999 |
ASJC Scopus Subject Areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering