Title :
Four-sectioned polarization-independent directional coupler with extremely relaxed fabrication tolerances
Author :
Granestrand, Per
Author_Institution :
Ericsson Telecom, Stockholm, Sweden
fDate :
6/1/1992 12:00:00 AM
Abstract :
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.<>
Keywords :
directional couplers; electro-optical devices; integrated optics; optical couplers; optical workshop techniques; beam propagation method; coupled wave theory; coupling length; electrode pattern; electrooptic device; fabrication tolerances; four sections; optical switch; physical length; polarization-independent directional coupler; Directional couplers; Electrodes; Fabrication; Optical coupling; Optical fiber polarization; Optical fiber theory; Optical fibers; Switches; Telecommunication switching; Voltage;
Journal_Title :
Photonics Technology Letters, IEEE
