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A curve fitting signal processing scheme for a white-light interferometric system with a synthetic source

✍ Scribed by Q. Wang; Y.N. Ning; K.T.V. Grattan; A.W. Palmer

Book ID: 104160119
Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 671 KB
Volume: 29
Category: Article
ISSN: 0030-3992
DOI: 10.1016/s0030-3992(97)00043-1

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✦ Synopsis

A white-light interferometric system, which comprises two Michelson interferometers linked by a 100 pm diameter core multimode step index fibre has been investigated, where a signal processing scheme, using curve fitting, has been introduced to suppress the noise induced in the system. The theoretical resolution of such a sensor with the use of an appropriate curve fitting signal processing scheme has been discussed. The experimental results obtained show the short term repeatability (to three standard deviations) to be better than 5 nm after signal processing, under conditions where the fibre is constantly vibrated in a known and reproducible way.

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