5-cm-long fiber Bragg grating is constructed by irradiating a single-mode fiber with a pair of 244-nm ultraviolet light beams. The fiber has V = 2.405 and n eff = 1.48.

5-cm-long fiber Bragg grating is constructed by irradiating a single-mode fiber with a pair of 244-nm ultraviolet light beams. The fiber has V = 2.405 and n eff = 1.48. The half-angle between the two beams is /2 = 13.5°. If the photo-induced index change is 2.5 × 10 -4 , find the following:
(a) the grating period,
(b) the Bragg wavelength,
(c) the coupling coefficient,
(d ) the full bandwidth AX measured between
the zeros on either side of R max (e) the maximum reflectivity.

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