Both a nonfocusing and a focusing preferential-order volume grating waveguide coupler were designed, fabricated, and tested. These volume grating couplers are designed to outcouple a 633-nm wave guided in an adjacent polyimide waveguide film. The slanted-fringe volume gratings are recorded holographically by the interference of two 364-nm waves. The dynamics of the holographic photopolymer HRF600X001 are investigated in relation to the interaction with the guided wave. The fabricated couplers exhibited a preferential coupling of 98%, a spatial coupling rate of 3.6 mm<sup>−1</sup>, and a coupling efficiency of 95%. The focusing grating coupler focused the outcoupled beam to a focal line with a full width at half-maximum of 10.49 μm located 25 mm above the grating.
© 2000 Optical Society of America
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1970) Diffraction and gratings : Diffractive optics
(050.7330) Diffraction and gratings : Volume gratings
(130.0130) Integrated optics : Integrated optics
Stephen M. Schultz, Elias N. Glytsis, and Thomas K. Gaylord, "Design, Fabrication, and Performance of Preferential-Order Volume Grating Waveguide Couplers," Appl. Opt. 39, 1223-1232 (2000)