| Issue |
EPJ Web Conf.
Volume 309, 2024
EOS Annual Meeting (EOSAM 2024)
|
|
|---|---|---|
| Article Number | 06015 | |
| Number of page(s) | 2 | |
| Section | Topical Meeting (TOM) 6- Optical Materials | |
| DOI | https://doi.org/10.1051/epjconf/202430906015 | |
| Published online | 31 October 2024 | |
https://doi.org/10.1051/epjconf/202430906015
Periodically-Poled Lithium Tantalate Ridge Waveguides for Efficient Nonlinear Frequency Conversion in the Near UV
Faculty of Electrical Engineering, Helmut Schmidt University, 22043 Hamburg, Germany
* Corresponding author: kip@hsu-hh.de
Published online: 31 October 2024
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 LiTaO3 crystals. For both dopants high optical damage thresholds >10 MW/cm2 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.
© The Authors, published by EDP Sciences, 2024
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