Fiber Bragg Gratings

Fiber Bragg Gratings technology is extensively used in the Telecommunications industry. They find applications in signal processing, sensors, fiber lasers, wavelength division multiplexing, broad-band filtering, laser stabilization et al. Fiber Bragg Gratings FBG in short are made using a complex process. The core of a single-mode fiber is laterally exposed to a periodic pattern of intense ultraviolet light. Due to this exposure there’s a permanent increase in the refractive index of the fiber's core. This activity leads to the creation of a fixed index modulation based on the exposure pattern. The fixed index modulation is known as grating.