| Autor: |
Zhao J, Rüsing M, Javid UA, Ling J, Li M, Lin Q, Mookherjea S |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2020 Jun 22; Vol. 28 (13), pp. 19669-19682. |
| DOI: |
10.1364/OE.395545 |
| Abstrakt: |
High-fidelity periodic poling over long lengths is required for robust, quasi-phase-matched second-harmonic generation using the fundamental, quasi-TE polarized waveguide modes in a thin-film lithium niobate (TFLN) waveguide. Here, a shallow-etched ridge waveguide is fabricated in x-cut magnesium oxide doped TFLN and is poled accurately over 5 mm. The high fidelity of the poling is demonstrated over long lengths using a non-destructive technique of confocal scanning second-harmonic microscopy. We report a second-harmonic conversion efficiency of up to 939 %.W -1 (length-normalized conversion efficiency 3757 %.W -1 .cm -2 ), measured at telecommunications wavelengths. The device demonstrates a narrow spectral linewidth (1 nm) and can be tuned precisely with a tuning characteristic of 0.1 nm/°C, over at least 40 °C without measurable loss of efficiency. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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