A fiber-optic sensor is a that uses 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").
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Recent advances in Distributed Optical Fiber Sensing (DOFS) technologies, particularly Brillouin Optical Time Domain Analysis (BOTDA) and Rayleigh Optical Frequency Domain Reflectometry (ROTDR), have opened new pathways for real-time, high-resolution monitoring in mining. The methodology involves embedding the sensing fiber into boreholes within the overlying strata and employing grouting to achieve effective coupling with the rock mass, a critical step that restores the in situ geological environment and ensures measurement reliability. Precise monitoring and early warning of these factors are essential for disaster prevention and control. A critical aspect of this management is ground control, focusing on addressing rock instabilities that arise from the mining processes and ore removal. In an era where mining operations strive to balance economic growth with safety and efficiency, the integration of Distributed Fiber Optic Sensing (DFOS) technology is reshaping the industry.
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Distributed temperature sensing systems (DTS) are devices which measure temperatures by means of functioning as linear. Temperatures are recorded along the optical sensor cable, thus not at points, but as a continuous profile.
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Optical fibers can be used as sensors to measure, , and other quantities by modifying a fiber so that the quantity to be measured modulates the,,, or transit time of light in the fiber. Sensors that vary the intensity of light are the simplest, since only a simple source and detector are required.
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Glass optical fibers are almost always made from, but some other materials, such as,, and as well as crystalline materials like, are used for longer-wavelength infrared or other specialized applications. Fiber optic lighting utilizes optical fiber (flexible fiber made of glass or plastic) to transmit light from a light source to a remote location. It is comprised of a core and cladding (coating) that trap light, allowing light to travel long distances. The technology of fiber optics was first identified in the 1870's when John Tyndall noticed light from a gas street lamp was captured in a stream of water coming from a full barrel of water positioned beneath the light.
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