Abstract
Reflectivity and spectral properties of a thick reflection grating are discussed for the second-order Bragg diffraction regime. Analytical expressions for the reflection and gain coefficients are obtained with the help of the developed theory. A procedure is proposed for determining the wavelength of laser oscillations generated in an optically active grating. The influence of the second harmonic of dielectric permittivity spatial modulation on reflection and spectral characteristics of a grating was also analyzed. Comparison of the approximate results obtained by the proposed approach and by the numerical solution is carried out, and their excellent agreement is demonstrated.
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