In-Fiber Interferometric-Based Sensors: Overview and Recent Advances

Abstract

In-fiber interferometric-based sensors are a rapidly growing field, as these sensors exhibit many desirable characteristics compared to their regular fiber-optic counterparts and are being implemented in many promising devices. These sensors have the capability to make extremely accurate measurements on a variety of physical or chemical quantities such as refractive index, temperature, pressure, curvature, concentration, etc. This article is a comprehensive overview of the different types of in-fiber interferometric sensors that presents and discusses recent developments in the field. Basic configurations, a brief approach of the operating principle and recent applications are introduced for each interferometric architecture, making it easy to compare them and select the most appropriate one for the application at hand.

Optical Biomedical Diagnostics Using Lab-on-Fiber Technology: A Review

“…In a fiber optic interferometer (FOI) the interference of two light beams travelling different optical paths in a fiber or different fibers are investigated. One of these paths is kept such that it is easily perturbed by the external parameters like temperature, pressure, strain and refractive index so that these parameters can be quantified [60,61]. In FOI, the bulk optical components are replaced by the fiber to miniaturize the device to the fiber scales.…”

Advanced Fiber Sensors Based on the Vernier Effect

“…Over the past few decades, optical fiber sensors have been widely researched due to their unique merits such as compact size, remote monitoring ability, high flexibility, low propagating loss, low fabrication cost, and immunity to electromagnetic interference [ 1 ]. Large varieties of optical fiber sensors have been developed for sensing.…”

In Situ Synthesis of Gold Nanoparticles in Layer-by-Layer Polymeric Coatings for the Fabrication of Optical Fiber Sensors

“…Alternatively, wavelengthbased optical fiber sensors use changes in the wavelength as their detection principle [28]. Although they may be more complex and require more sophisticated optical instrumentation, they are considered more robust compared to intensity-based ones [29] in as far as their responses do not depend as much on the stability of light sources, etc. Some of the most used devices for wavelength-based approaches are fiber Bragg gratings (FBGs), tilted fiber Bragg gratings (TFBGs), long-period gratings (LPG), or interferometers.…”