26-03-2016, 01:15 PM
need seminar report
26-03-2016, 01:15 PM
need seminar report
06-04-2016, 11:39 AM
A fiber Bragg grating (FBG) is a type of distributed Bragg reflector constructed in a short segment of optical fiber that reflects particular wavelengths of light and transmits all others. This is achieved by creating a periodic variation in the refractive index of the fiber core, which generates a wavelength-specific dielectric mirror. A fiber Bragg grating can therefore be used as an inline optical filter to block certain wavelengths, or as a wavelength-specific reflector.
The first in-fiber Bragg grating was demonstrated by Ken Hill in 1978.[1] Initially, the gratings were fabricated using a visible laser propagating along the fiber core. In 1989, Gerald Meltz and colleagues demonstrated the much more flexible transverse holographic inscription technique where the laser illumination came from the side of the fiber. This technique uses the interference pattern of ultraviolet laser light[2] to create the periodic structure of the fiber Bragg grating. For more Visit https://www.rp-photonicsfiber_bragg_gratings.html
07-04-2016, 03:34 PM
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