Periodically-poled lithium tantalate ridge waveguides for efficient nonlinear frequency conversion in the near UV

Publication date
2024-10-31
Document type
Konferenzbeitrag
Author
Kretschmann, Sarah
Organisational unit
DOI
URI
ISSN
Conference
12th European Optical Society Annual Meeting, EOSAM 2024 ; Naples, Italy ; September 9–13, 2024
Series or journal
EPJ Web of Conferences
Periodical volume
309
Part of the university bibliography
✅
Abstract
Optical damage resistant ridge waveguides for blue and near UV wavelengths have been fabricated using high-temperature Zr and Zn diffusion doping and vapor transport equilibration (VTE) of congruent LiTaO_3 crystals. For both dopants high optical damage thresholds >10 MW/cm^2 for 532 nm light were demonstrated at room temperature, which can be increased by a factor ~3 when heating the samples to ~150°C. Ridge waveguides with low optical losses of ~0.4 dB/cm were fabricated using diamond-blade dicing. First-order periodic poling with grating periods of ~3 μm can be used for efficient nonlinear frequency conversion for both SHG (800 nm pump) or SPDC (400 nm pump) processes.
Description
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (https://creativecommons.org/licenses/by/4.0/)
Version
Published version
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Metadata only access