Dependence on Grating Length of Transmission Spectra of Long-Period Fiber Bragg Grating

Abstract

We have designed mechanically induced long period fiber grating (LPFG) in which the grating length can be changed to any value up to 16cm as we desire. Measurement of the dependence of the transmission spectrum on the grating length showed that the spectrum became sharper as the grating length was increased until about 10cm, and beyond this length the sharpness of the spectrum remained almost the same.