We propose and analyze a new optical system to transform linearly polarized laser modes into axially symmetric (radial or azimuthal) modes that show more promise in various applications, as well as generating various inhomogeneously polarized configurations. The system is based on the coherent composition of modal beams with phase diffraction gratings that allow the intermode phase shift to be varied without the need for auxiliary components. What makes the system simple and universal is the use of diffractive optical elements to generate required mode patterns with specific space orientation along with the simultaneous generation of different beams with different transverse mode content, all of which can subsequently be combined.
© 2010 Optical Society of America
Diffraction and Gratings
Original Manuscript: January 28, 2010
Revised Manuscript: March 1, 2010
Manuscript Accepted: March 3, 2010
Published: March 24, 2010
Svetlana N. Khonina and Sergey V. Karpeev, "Grating-based optical scheme for the universal generation of inhomogeneously polarized laser beams," Appl. Opt. 49, 1734-1738 (2010)