This article is cited in 1 paper

Interferometry

Chromatic dispersion effects in ultra-low coherence interferometry

V. V. Lychagov^a, V. P. Ryabukho<sup>ab

a</sup> Saratov State University named after N. G. Chernyshevsky
^b Institute of Precision Mechanics and Control, Russian Academy of Sciences, Saratov

Abstract: We consider the properties of an interference signal shift from zero-path-difference position in the presence of an uncompensated dispersive layer in one of the interferometer arms. It is experimentally shown that in using an ultra-low coherence light source, the formation of the interference signal is also determined by the group velocity dispersion, which results in a nonlinear dependence of the position of the interference signal on the geometrical thickness of the dispersive layer. The discrepancy in the dispersive layer and compensator refractive indices in the third decimal place is experimentally shown to lead to an interference signal shift that is an order of magnitude greater than the pulse width.

Keywords: white-light interferometry, dispersion, full-field optical coherence tomography, coherence.

PACS: 42.25.Hz, 42.25.Kb, 42.30.Wb

Received: 07.07.2014
Revised: 11.08.2014

 English version: Quantum Electronics, 2015, 45:6, 556–560

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