Title :
Calculation and experimental verification of two-dimensional focusing grating couplers
Author :
Heitmann, Detlef ; Ortiz, Carmen
Author_Institution :
IBM Research Laboratory, San Jose, CA
fDate :
7/1/1981 12:00:00 AM
Abstract :
A ray tracing method has been performed to calculate the focus spot size of two-dimensional focusing grating couplers that are produced by holographic interferometry of freely propagating wavefronts. The calculations have been used to optimize the constructing optical configuration. Diffraction limited spot diameters of about 2 μm can be achieved for couplers at wavelength 632.8 nm. These spot sizes have been experimentally verified for coupling and focusing TE modes which are guided in sputtered glass films on Si substrates.
Keywords :
Geometrical optics (GO); Holographic interferometry; Light-beam focusing; Optical diffraction gratings; Optical planar waveguide couplers; Couplers; Gratings; Holographic optical components; Holography; Optical diffraction; Optical films; Optical interferometry; Optical propagation; Ray tracing; Tellurium;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.1981.1071260
