Title :
Integrated optics eight-port 90 degrees hybrid on LiNbO/sub 3/
Author :
Hoffman, D. ; Heidrich, H. ; Wenke, G. ; Langenhorst, R. ; Dietrich, E.
Author_Institution :
Heinrich-Hertz-Inst. fuer Nachrichtentech., Berlin, West Germany
fDate :
5/1/1989 12:00:00 AM
Abstract :
The design, fabrication, and characterization of an integrated optical eight-port 90 degrees hybrid in LiNbO/sub 3/ are discussed. The hybrid is realized as a bridge circuit comprising four directional couplers and two phase shifters, each of the devices being electrooptically tunable. The electrodes are fabricated as combined indium-tin-oxide/gold multilayers. The component provides the desired phase pattern of the intermediate frequency. Measurements on the phase stability of the integrated bridge show phase fluctuations of <+or-5 degrees and a temperature drift of approximately=15 degrees / degrees C. Both may be eliminated by a phase control loop.<>
Keywords :
bridge circuits; directional couplers; integrated optics; lithium compounds; optical couplers; phase shifters; ITO-Au; InSnO-Au; LiNbO/sub 3/; bridge circuit; directional couplers; electrooptic tuning; integrated optical eight-port 90 degrees hybrid; intermediate frequency; phase control loop; phase pattern; phase shifters; phase stability; Bridge circuits; Directional couplers; Electrodes; Electrooptic devices; Integrated optics; Optical design; Optical device fabrication; Optical variables control; Phase shifters; Tunable circuits and devices;
Journal_Title :
Lightwave Technology, Journal of
