These devices, essentially lengths of optical fiber, introduce a controlled time delay between the transmission and reception of light signals. Fiber optic delay lines have become an indispensable component in the realm of fiber optic sensing. Optical fibers serve as a transmission medium, transmitting signals by reflecting or. Distributed and quasi-distributed fiber optic sensors are systems that connect opto-electronic interrogators to an optical fiber (or cable), converting the fiber to an array of distributed sensors. The fiber becomes the sensor while the interrogator injects laser energy into the fiber and detects. Fiber optic sensors play a key role in developing the communication system to sense & measure the change within phase, data transmission rate, wavelength, intensity, noise, uneven environmental conditions, extreme heat, high vibration, etc., small, lightweight, resistant to high temperatures and pressure, electromagnetically passive, among others.
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