CC BY-NC-SA 3.0 UnportedMartincek, I.Pudis, D.Kacik, D.Schuster, K.2020-08-132020-08-132010https://doi.org/10.34657/4177https://oa.tib.eu/renate/handle/123456789/5548A method for determination of the volume fraction in binary liquid mixtures by measurement of the equalization wavelength of intermodal interference of modes LP01 and LP11 in a liquid core optical fiber is presented in this paper. This method was studied using a liquid core optical fiber with fused silica cladding and a core made up of a binary silicon oil/chloroform liquid mixture with different volume fractions of chloroform. The interference technique used allows us to determine the chloroform volume fraction in the binary mixture with accuracy better than 0.1%. One of the most attractive advantages of presented method is very small volume of investigated mixture needed, as only a few hundred picoliters are necessary for reliable results. © 2010 by the authors.enghttps://creativecommons.org/licenses/by-nc-sa/3.0/620Equalization wavelengthIntermodal interferenceMixture volume fractionBinary-liquid mixturesEqualization wavelengthFused silica claddingIntermodal interferencesLiquid core optical fibersLiquid mixtureReliable resultsSilicon oilBinary mixturesChlorine compoundsOptical fibersVolume fractionchloroformglass fibersilicon dioxidearticlechemistryequipment designmethodologyreproducibilitysolution and solubilitytheoretical modelChloroformEquipment DesignModels, TheoreticalOptical FibersReproducibility of ResultsSilicon DioxideSolutionsArticle