Title :
Three-wavelength combination source for white-light interferometry
Author :
Wang, D.N. ; Ning, Y.N. ; Grattan, K.T.V. ; Palmer, A.W. ; Weir, K.
Author_Institution :
Dept. of Electr., Electron. & Inf. Eng., City Univ., London, UK
Abstract :
A three-wavelength combination source in white-light interferometry (WLI) is used to simplify the central fringe identification. It is found that, by using this technique, the minimum signal-to-noise ratio required by the system to identify the central fringe position can be reduced when compared with the use of two-wavelength combination sources. This technique is simple and effective and has potential uses in coherence-multiplexed interferometric sensor systems.<>
Keywords :
light interferometry; light sources; optical sensors; central fringe identification; coherence-multiplexed interferometric sensor systems; minimum signal-to-noise ratio; three-wavelength combination source; white-light interferometry; Coherence; Diode lasers; Interference; Light sources; Metrology; Optical coupling; Optical interferometry; Power generation; Signal to noise ratio; Stability;
Journal_Title :
Photonics Technology Letters, IEEE
