Title :
Optical polarization-diversity receiver integrated on titanium-diffused lithium niobate
Author :
Saulnier, J. ; Ramus, C. ; Huet, F. ; Carre, M.
Author_Institution :
CNET, Lab. de Bagneux, France
Abstract :
The authors describe the design and measurement characteristics of a lithium niobate polarization-diversity chip, realized on an X-cut, Z-propagation substrate. The use of the electrooptic effect offers the potential advantage of tunability in a wide spectral range. This device can be used as part of a hybrid balance substrate. The receiver structure is shown. The optimal signals from the transmission fiber and the local oscillator are combined in a 3-dB directional coupler. The transverse-electric and transverse-magnetic polarized waves from the coupler´s output waveguides are then spatially separated using two polarization splitters. This design avoids the use of intersecting waveguides.<>
Keywords :
directional couplers; electro-optical devices; integrated optics; lithium compounds; optical communication equipment; optical couplers; optical fibres; receivers; titanium; LiNbO/sub 3/:Ti polarization diversity chip; X-cut Z-propagating substrate; coupler´s output waveguides; design; directional coupler; electrooptic effect; hybrid balance substrate; local oscillator; measurement characteristics; optical polarization diversity receiver; optimal signals; polarization splitters; receiver structure; spectral range; transmission fiber; transverse electric polarized waves; transverse-magnetic polarized waves; tunability; Electrooptic effects; Integrated optics; Lithium niobate; Optical fiber couplers; Optical fiber devices; Optical fiber polarization; Optical polarization; Optical receivers; Optical waveguides; Semiconductor device measurement;
Journal_Title :
Photonics Technology Letters, IEEE
