Optical waveguides – Integrated optical circuit
Patent
1998-07-28
2000-03-28
Palmer, Phan T. H.
Optical waveguides
Integrated optical circuit
385 3, 385 4, 385129, 385131, 385132, G02B 612
Patent
active
060441844
ABSTRACT:
An integrated optics chip with improved performance when exposed to changing temperature is disclosed. The optic chip or integrated optics chip or MIOC has a top surface, a +Z face and -Z face. The integrated optics chip is formed from a crystal substrate having a high electro-optic coefficient such as Lithium Niobate. For the purpose of orienting the components to the optic chip to be described, the +Z crystal axis extends outward from the +Z face, the Z axis being the axis across which a pyroelectric effect is exhibited. The top surface is orthogonal to the Z axis. An input waveguide on the top surface receives an optical signal from an input port, passes the signal via a waveguide network, to an output waveguide coupling the waveguide network to an output port. A portion of the +Z and -Z faces are coated at least partially with a conductive coating. A conductive path couples the +Z and -Z faces to prevent a charge differential from developing between the +Z and -Z faces due to a change in temperature of the optic chip and the pyroelectric effect.
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Naoki Mitsugi et al, Activation Energy for Dc-drift in X-cut LiNbO3 Optical Intensity Modulators, Eng. & Lab. Notes.
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Abbink Henry C.
Geosling Christine E.
Rahn John P.
Shafer Kenneth W.
Zimmerman Gregory A.
Kirk James F.
Litton Systems Inc.
Palmer Phan T. H.
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