OPTICAL INTERFEROMETER USING A HIGH-BIREFRINGENCE OPTICAL-FIBER

Citation
U. Minoni et al., OPTICAL INTERFEROMETER USING A HIGH-BIREFRINGENCE OPTICAL-FIBER, IEEE transactions on instrumentation and measurement, 42(2), 1993, pp. 231-233
Citations number
6
Categorie Soggetti
Engineering, Eletrical & Electronic","Instument & Instrumentation
ISSN journal
00189456
Volume
42
Issue
2
Year of publication
1993
Pages
231 - 233
Database
ISI
SICI code
0018-9456(1993)42:2<231:OIUAHO>2.0.ZU;2-K
Abstract
The paper presents a prototype of a new displacement measuring system based on an optical interferometer using a polarization-maintaining op tical fiber. The proposed configuration makes it possible to separate the laser head and the detectors from the actual interferometer (i.e., the measuring head). In this way, the interferometric head can be min iaturized and used to gauge targets which are difficult to access. The resolution provided by the electronic fringe counter is equal to lamb da/8 (approximately 80 nm), and the overall accuracy is 1 mum over a m easuring range of 20 mm.