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A New World of Fiber Sensors

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Dr. Saeed Rehman, Fibertronix AB, and Dr. Åsa Claesson, Acreo Fiberlab

Optical fiber is well-known for its ability to carry information at high speeds over long distances. Twenty years after the first transatlantic fiber optic cable was laid, these strands of ultrapure glass continue to offer unrivaled bandwidths. They have evolved a long way from the first low-loss fiber demonstrated in the late 1960s. Less often thought of are a multitude of other applications. Fiber optic technologies offer unique features that can be exploited in a variety of ways, such as carrying high optical powers in flexible lightguides for welding stations, transferring images in...Read full article

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    Published: October 2009
    Glossary
    bandwidth
    The range of frequencies over which a particular instrument is designed to function within specified limits. See also fiber bandwidth.
    birefringence
    Birefringence is an optical property of certain materials that causes them to exhibit different refractive indices for light of different polarizations. In other words, when light passes through a birefringent material, it splits into two separate rays, each traveling with a different speed and direction. This phenomenon is also known as double refraction. The difference in refractive indices for the two polarizations is a characteristic feature of birefringent materials. The separation of...
    cladding
    The low-refractive-index material that surrounds the core of an optical fiber to contain core light while protecting against surface contaminant scattering. In all-glass fibers, the cladding is glass. In plastic-clad silica fibers, the plastic cladding also may serve as the coating.
    fiber bragg grating
    A fiber Bragg grating (FBG) is a type of optical filter that is inscribed or "written" into the core of an optical fiber. It consists of a periodic modulation of the refractive index along the length of the fiber. This modulation forms a grating structure that reflects a specific wavelength of light while transmitting others. Key features of FBGs include: Periodic modulation: The refractive index of the optical fiber's core is periodically modulated, creating a series of alternating high...
    optical fiber
    Optical fiber is a thin, flexible, transparent strand or filament made of glass or plastic used for transmitting light signals over long distances with minimal loss of signal quality. It serves as a medium for conveying information in the form of light pulses, typically in the realm of telecommunications, networking, and data transmission. The core of an optical fiber is the central region through which light travels. It is surrounded by a cladding layer that has a lower refractive index than...
    polarization
    Polarization refers to the orientation of oscillations in a transverse wave, such as light waves, radio waves, or other electromagnetic waves. In simpler terms, it describes the direction in which the electric field vector of a wave vibrates. Understanding polarization is important in various fields, including optics, telecommunications, and physics. Key points about polarization: Transverse waves: Polarization is a concept associated with transverse waves, where the oscillations occur...
    radiation
    The emission and/or propagation of energy through space or through a medium in the form of either waves or corpuscular emission.
    transducer
    A transducer is a device or component that converts one form of energy into another. It is commonly used in various fields, including electronics, acoustics, and instrumentation, to facilitate the measurement, detection, or transmission of information. Transducers are essential in converting signals from one domain to another for processing or interpretation. Key points about transducers include: Energy conversion: Transducers convert energy from one form to another. The input energy can be...
    Acreo FiberlabacrylatesaerospaceAsa ClaessonasymmetricbacteriabandwidthbirefringencecablechemicalcladdingCoatingsCommunicationsdefenseelectricendoscopesErbiumevanescentFBGFeaturesfiber Bragg gratingfiber optic sensingfiber opticsFibertronixgasGeminihealthhermetichydrogenhydrophonesindustrialinterferometerslightguidemagneticmarinemicrobendmissilesmulticoremultifibermultimodenanowireoiloptic gyroscopesoptical fiberorthogonalpassbandpHphotosensitivepigtailingpolarizationpolyimideradiationSaeed RehmansecuritysensingSensors & Detectorssiliconesingle-modespecialty fiberstructuralsubmarinesurgerythermal couplingtransducervoltageytterbiumLasers

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