Fiber optic sensors are devices that use light transmitted through optical fibers to measure various physical parameters, such as temperature, pressure, and strain. These sensors work by detecting changes in the light signal as it travels through the fiber, allowing for precise and real-time monitoring of conditions in various environments. One of the key advantages of fiber optic sensors is their immunity to electromagnetic interference, making them ideal for use in harsh or sensitive environments. They are commonly used in industries like telecommunications, aerospace, and civil engineering for structural health monitoring and other applications where traditional sensors may not be effective.