Creating a dynamic periodic poling system for x-cut lithium niobate chip-scale integrated optics
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Date
2016-05
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The Ohio State University
Abstract
A system for periodically poling x-cut lithium niobate (LN) is designed and tested. LabVIEW was used for instrumentation control software to create and send an arbitrary waveform to an arbitrary waveform generator and then into a high-voltage amplifier. This high-voltage waveform was then applied through a designed poling circuit and sample station onto the prepared LN sample. Both the LabVIEW software and the poling circuit were designed to be easy to use and dynamic to allow for the poling of multiple different materials.
The baseline poling of LN was achieved using the LabVIEW software and poling setup. The poling was characterized using FIB milling and HF etching, as well as with piezoresponse force microscopy (PFM). Although it could be optimized, the PFM did show successful poling in a non-destructive way. MgO-doped LN (MgO:LN) was then attempted, but no poling results were achieved.
Overall, the poling system was successful in baseline poling x-cut LN for on-chip integrated optics and in laying the foundation for poling other materials, as well. Future work includes decreasing the effects of leakage current in poling MgO:LN and investigating the possibilities of reverse poling and thin film poling.
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Keywords
Periodic poling, Lithium niobate, X-cut, Integrated optics