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Specifically, fiber Bragg gratings are finding uses in instrumentation applications such as seismology, [29] pressure sensors for extremely harsh environments, and as downhole sensors in oil and gas wells for measurement of the effects of external pressure, temperature, seismic vibrations and inline flow measurement. As such they offer a ...
An addressed fiber Bragg structure can perform triple function in fiber-optic sensor systems: a sensor, a shaper of double-frequency probing radiation, and a multiplexor. The key feature of AFBS is that it enables the definition of its central wavelength without scanning its spectral response, as opposed to conventional fiber Bragg gratings ...
In 1919, George Schlichten received a U.S. patent on his improvements of the decorticator for treating fiber bearing plants. [3] Schlichten failed to find investors for production of his decorticator and died in 1923, a broken man. His business was revived a decade after death in 1933. [4] [5]
A fiber-optic sensor is a sensor that uses optical fiber either as the sensing element ("intrinsic sensors"), or as a means of relaying signals from a remote sensor to the electronics that process the signals ("extrinsic sensors"). Fibers have many uses in remote sensing.
A leaf sensor is a phytometric device (measurement of plant physiological processes [1]) that measures water loss or the water deficit stress (WDS) in plants [2] by real-time monitoring the moisture level in plant leaves. The first leaf sensor was developed by LeafSens, an Israeli company granted a US patent for a mechanical leaf thickness ...
Microbend gratings, which are antisymmetric with respect to the fiber axis, create a resonance between the core mode and the asymmetric LP1m modes of the core and the cladding. Long period grating has a wide variety of applications, including band-rejection filters, gain flattening filter and sensors.
Bast fiber from oak trees forms the oldest preserved woven fabrics in the world. It was unearthed at the archeological site at Çatalhöyük in Turkey and dates to 8000-9000 years ago. [5] Dress of unspecified bast fibre, Yuracaré, Rio Chimoré, Bolivia 1908–1909. Cycling suit of linen bast fiber, New York, New York, United States, 1908
Retting is a process employing the action of micro-organisms and moisture on plants to dissolve or rot away much of the cellular tissues and pectins surrounding bast-fibre bundles, facilitating the separation of the fibre from the stem. [1] It is used in the production of linen from flax stalks and coir from coconut husks.
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