Interferometric fibre displacement/strain sensor based on source coherence synthesis |
| |
| Authors: | Berkoff T.A. Kersey A.D. |
| |
| Affiliation: | Sachs. Freeman Associates, Landover, MD, USA; |
| |
| Abstract: | A displacement sensing technique is described, based on the use of a laser source frequency modulated at a relatively high rate to induce visibility modulation in the 'baseband' interference signal derived from a two-beam interferometer. Feedback control of the laser modulation, to lock the visibility to a minimum, is demonstrated.<> |
| |
| Keywords: | |
|
|
