Wavelength profiles of nonlinear irradiated apodized chirped Bragg grating

We present the effect of gamma radiation on the selectivity of the Nonlinear Apodized Chirped Bragg Grating (NACBG). As the shift in the wavelength selection for the nonlinear fiber Bragg grating is investigated. Also trial has been made to calculate this shift for the high power signals (n2 = 2.6 × 10−20 W/m2). Comparison between the irradiated and unirradiated NACBG has been investigated. The optimum profile is investigated. It is found that the tanh profile is the greatest profile affected by radiation, it has error of about 0.62 nm at the sea level, while Hamming profile is the smallest one, with an error of 0.36 nm at the sea level.

► We calculate the effect of the gamma radiation on the Bragg grating. ► Seven profiles of the apodized Bragg grating are taken into account. ► Change in the wavelength selection is also investigated.