Reflection of light from the surface and propagation characteristics of a double-sided corrugated waveguide

A theoretical investigation is made of the anomalies of the spectral and angular dependences of the reflection coefficient of light incident on the surface of a waveguide corrugated on both sides. The formulas for radiation losses in such a waveguide are given and analyzed. It is shown that for a certain ratio of the amplitudes and phases of the diffraction gratings the radiation is coupled out of the waveguide only into one of the adjoining media and there is no anomalous reflection of light from the waveguide surface.