Title :
Diffraction into a corrugated waveguide from normally incident radiation
Author :
Taylor, G.W. ; Kwan, C.
Author_Institution :
Dept. of Electr. & Syst. Eng., Connecticut Univ., Storrs, CT, USA
fDate :
12/1/1998 12:00:00 AM
Abstract :
The diffraction of a plane wave normally incident upon a corrugated waveguide with a second-order grating pitch is examined. Using a rectangular grating the efficiency of diffraction into the first-order components in the form of guided waves is determined. Using simple approximations, closed-form expressions are found from which the dependence of efficiency upon grating thickness, waveguide thickness, grating pitch, and indexes are predicted. The approach provides a useful simulation tool to predict the efficiency of coupling into a waveguide from an external or internal orthogonal source
Keywords :
approximation theory; diffraction gratings; integrated optoelectronics; light diffraction; optical couplers; optical waveguide theory; IOE waveguide coupling; closed-form expressions; corrugated waveguide diffraction; external orthogonal source; first-order components; grating pitch; grating thickness; guided waves; indexes; internal orthogonal source; light diffraction; normally incident radiation; plane wave diffraction; rectangular grating; second-order grating pitch; simple approximations; simulation tool; waveguide thickness; Closed-form solution; Coupling circuits; Diffraction gratings; Infrared detectors; Integrated optics; Optical diffraction; Optical propagation; Optical waveguides; Planar waveguides; Predictive models;
Journal_Title :
Lightwave Technology, Journal of
