Title :
Eigenmode analysis of optical switches in LiNbO/sub 3/-theory and experiments
Author :
Weierholt, Audun J. ; Neegard, Steinar ; Mickelson, Alan R.
Author_Institution :
Electron. Res. Lab., Norwegian Inst. of Technol., Trondheim, Norway
Abstract :
The alternating electrode voltage directional coupler is analyzed by using the orthogonal symmetric and antisymmetric eigenmodes of a parallel waveguide structure. Then, conventional coupled-mode theory can be applied without modification of coupling constants. Lateral and longitudinal symmetry of electrodes and waveguides is assumed. In particular, a specific Ti:LiNbO/sub 3/ coupler is considered. It is found that the orthogonal eigenmode description leads to a different explanation of the operational principle of the so-called Delta beta coupler, as compared to conventional analysis in terms of nonorthogonal individual guide modes.<>
Keywords :
directional couplers; electro-optical devices; integrated optics; lithium compounds; optical couplers; optical switches; titanium; LiNbO/sub 3/:Ti; alternating electrode voltage directional coupler; antisymmetric eigenmodes; conventional coupled-mode theory; nonorthogonal individual guide modes; optical switches; orthogonal eigenmode description; orthogonal symmetric eigenmodes; parallel waveguide structure; symmetry; Councils; Coupled mode analysis; Electrodes; Equations; Fabrication; Optical switches; Optical waveguides; Propagation constant; Voltage; Waveguide theory;
Journal_Title :
Quantum Electronics, IEEE Journal of
