The great importance of measuring the refractive index (RI) in order to characterize the optical properties of fluids has led, over the past decades, to the development of RI sensors for applications in several areas such as the measurement of salinity of water, fuel. The great importance of measuring the refractive index (RI) in order to characterize the optical properties of fluids has led, over the past decades, to the development of RI sensors for applications in several areas such as the measurement of salinity of water, fuel. The review is divided into three parts: the first section introduces a general view of the most relevant refractometric sensors that have been reported over the l...
Fiber-optic refractive index (RI) sensors based on wavelength-shift-based interrogation continue to present a challenge in achieving high sensitivity for a wide detection range. In this paper, we propose
An equivalent refractive index mathematic model is presented according to the geometrical structure of multi-coating D-shaped fibres, and the analysis of the loss characteristics of
Optical sensing is an emerging field that may replace electronic sensing, in the same way that electronic sensing has replaced traditional mechanical sensing. In this project we explore the methods of
This review is focused on microstructured optical fiber sensors developed in recent years for liquid RI sensing. The review is divided into three
Abstract An ultra-compact and sensitive Fabry-Perot interferometer liquid refractive index sensor is presented. The device consists of an inner reflection mirror in single-mode fiber written by
The work describes a surface plasmon resonance (SPR) sensor that measures the liquid level and refractive index (RI) simultaneously. The sensor is
A method of measuring the refractive index of liquid based on the change of speckle contrast in fiber is presented. The correlation of propagation losses, proportional to the speckle contrast, is used when
An optical fiber, partially stripped of its cladding is shown to sense refractive index of a liquid in which the uncladded sensing region is immersed, to a high degree of precision and over a
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In this paper, a dual-parameter liquid level and refractive index (R.I.) sensor is fabricated using three pieces of bare polymer optical fibers (POFs), which can independently and...
Refractive index (RI) optical fiber sensors are often used in biomedical and petrochemical fields. However, existing optical fiber sensors can only detect liquids with low RI, and cannot meet the
Optical fiber sensors offer a distinctive advantage in enabling highly sensitive, multiparameter in situ measurements in the harsh electrochemical environment
As a laser passes through a scattering medium, the light interacts with the irregular reflections within the medium, resulting in light scattering and the formation of speckles. In this paper,
1. Introduction The refractive index measurement sensors find numerous applications in industries for finding the physical parameters such as concentration, temperature, pressure, etc. Many people
In this paper, we propose a sensor for determining the RI of liquids based on femtosecond laser (fs-laser) writing of a dual-side polished singlemode–multimode–singlemode (SMS) fiber.
The sensing region of the optical fiber with a diameter of 125 µm used as the sensor was reduced to a waist diameter of 10 µm along a length of 2.25 cm. The sensor exhibits highly sensitive
In this present work we report fabrication of fiber optic liquid refractive index (RI) measurement sensor based on Michelson Interferometer method. This
A novel intensity modulated fiber optic sensor (FOS) for liquid refractive index measurement is presented in this communication. The sensor principle is based on frustrated total
The document presents a comprehensive review of optical fiber refractive index sensors, discussing various methodologies and fabrication processes for
In this project we explore the methods of optical sensing, utilizing optical fiber technology to develop a refractive index sensor that can be of benefit in many applications.
Sensitivity to refractive index differential, of the sensor response, increases with increase in refractive index of the liquid pair, below that of the fiber core. In this range of refractive index, we
Its widespread role as an optical material has been enabled by manufacturing the glass from pure liquid precursor compounds, thereby
We also experimentally verify that the refractive index sensitivity can be enhanced with the shorter fiber length of the RRFL. This work extends the application of the random fiber laser as a new
A simple fiber optic sensor is presented to determine the refractive index of liquids. The study shows that the output light intensity peak observed in various liquids is function of the refractive index of the
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