A new type of polarization-independent directional coupler is proposed. The principle, which utilizes an electrode pattern in four sections, gives extremely large fabrication tolerances in terms of allowed values on the L/l/sub c/ ratios (physical length/coupling length) for the two polarizations. The concept is analyzed by coupled wave theory, and the result is checked for one case with the beam propagation method.>
No takes yet. Share an insight, caveat, or question.
P. Granestrand (1992) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: