title: Fiber-optic dipping liquid analyzer: theoretical and experimental study of light transmission.
abstract: A fiber-optic dipping liquid analyzer (FDLA) is developed for measuring liquid properties such as concentration, refractive index, surface tension, and viscosity. An important feature of the FDLA is that a liquid drop is introduced on the end face of a fiber probe, and the drop can be regarded as a planar-convex lens. The light transmitting path and receiving power are affected by the refractive index of the liquid drop. We present a theoretical and experimental analysis of the light transmission. A mathematical model of receiving power is established based on paraxial refraction imaging and fiber reflective intensity modulation methods. Sucrose-water solutions were tested with the FDLA. The experimental results agree well with the theoretical analysis.
authors.affiliation: Optics Research Center, College of Science, Harbin Engineering University, Harbin, 150001, China.
authors.forename: Ai
authors.initials: A
authors.lastname: Zhou
authors.forename: Zhihai
authors.initials: Z
authors.lastname: Liu
authors.forename: Libo
authors.initials: L
authors.lastname: Yuan