Open AccessControl of the coherence behavior in a SFG interferometer through the multipump phases command
Author(s) -
Pascaline Darré,
Lucien Lehmann,
Ludovic Grossard,
Laurent Delage,
François Reynaud
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.007098
Subject(s) - interferometry , optics , coherence (philosophical gambling strategy) , signal (programming language) , physics , coherence length , phase (matter) , optical coherence tomography , astronomical interferometer , computer science , superconductivity , quantum mechanics , programming language
In this paper, we report on a novel method to control the coherence behavior in a sum frequency generation interferometer powered by two independent pump lines. At the output of the interferometer, the two incoherent fringe patterns must be superimposed to maximize the contrast. The first step consists in canceling the differential group delay. The second one uses the phase control on one pump to synchronize the fringe patterns. This innovative method is experimentally demonstrated with a setup involving a 1544 nm signal and two pump lines around 1064 nm leading to a converted signal around 630 nm. It can be easily extended to a greater number of pump lines.