High system efficiency nonlinear frequency conversion on thin-film lithium niobate
Integrated photonic platforms can greatly enhance the efficiency of nonlinear frequency conversion processes by tightly confining light on a sub-micron scale. However, this advantage is often reduced by large fiber-to-chip coupling losses that drastically reduce the overall performance. Here, we dem...
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| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
June 3, 2025
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| In: |
Optics letters
Year: 2025, Jahrgang: 50, Heft: 12, Pages: 3844-3847 |
| ISSN: | 1539-4794 |
| DOI: | 10.1364/OL.561750 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1364/OL.561750 Verlag, lizenzpflichtig, Volltext: https://opg.optica.org/ol/abstract.cfm?uri=ol-50-12-3844 
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| Verfasserangaben: | Philipp Lohmann, Daniel Wendland, Francesco Lenzini, Wolfram H.P. Pernice |
MARC
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| 520 | |a Integrated photonic platforms can greatly enhance the efficiency of nonlinear frequency conversion processes by tightly confining light on a sub-micron scale. However, this advantage is often reduced by large fiber-to-chip coupling losses that drastically reduce the overall performance. Here, we demonstrate a highly efficient thin-film lithium niobate (LN) frequency converter based on periodically poled waveguides combined with direct laser written out-of-plane couplers. Including on-chip and fiber-to-chip losses, we obtain a conversion efficiency of 152%/W, thus demonstrating a promising approach for future scalable integrated devices. | ||
| 650 | 4 | |a Effective refractive index | |
| 650 | 4 | |a Lithium niobate | |
| 650 | 4 | |a Lithium niobate waveguides | |
| 650 | 4 | |a Nonlinear frequency conversion | |
| 650 | 4 | |a Physical vapor deposition | |
| 650 | 4 | |a Total internal reflection | |
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