Title :
Theoretical concepts of a novel Vernier-based fringe-counting fibre optic sensor
Author_Institution :
Fac. of Electr. Eng. & Telecommun., Norwegian Univ. of Sci. & Technol., Trondheim, Norway
fDate :
6/1/1997 12:00:00 AM
Abstract :
A novel fringe-counting fibre optic sensor is proposed. It consists of a Vernier-type optical fibre resonator, and is driven by a source that covers one or several free spectral ranges of the Vernier resonator. Such a source can be synthesised by scanning a single-mode laser. The resolution of the sensor can be a small fraction of a wavelength. Fibre optic Vernier resonators can be constructed in several ways. A design using two cascaded fibre Fabry-Perot resonators is analysed in detail. An equivalent design consisting of two recirculating ring resonators is suggested as an improved solution
Keywords :
Fabry-Perot resonators; fibre optic sensors; laser modes; measurement by laser beam; optical design techniques; optical resolving power; Vernier-based fringe-counting fibre optic sensor; Vernier-type optical fibre resonator; cascaded fibre Fabry-Perot resonators; equivalent design; fibre sensor design; free spectral ranges; fringe-counting fibre optic sensor; recirculating ring resonators; resolution; single-mode laser scanning;
Journal_Title :
Optoelectronics, IEE Proceedings -
DOI :
10.1049/ip-opt:19971270
