Coupled-wave analysis was applied to the problem of optical wave diffraction in a thick reflection-type phase grating in a condition of second-order Bragg regime. Within the approximation of two resonant waves in a medium with phase (refractive index) modulation, an analytical formula was derived for the diffraction efficiency. A shift of the maximum of a diffraction efficiency contour from the position determined by vector synchronism (second-order Bragg resonance) was detected.
© 2009 Optical Society of America
Diffraction and Gratings
Original Manuscript: December 4, 2008
Manuscript Accepted: January 17, 2009
Published: March 16, 2009
M. V. Vasnetsov, V. Yu. Bazhenov, S. S. Slussarenko, and G. Abbate, "Coupled-wave analysis of second-order Bragg diffraction. I. Reflection-type phase gratings," J. Opt. Soc. Am. B 26, 684-690 (2009)