Electro-optically tunable single-frequency lasing from neodymium-doped lithium niobate microresonators
| Autor: | Minet, Yannick, Herr, Simon J., Breunig, Ingo, Zappe, Hans, Buse, Karsten |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Opt. Express 30, 28335-28344 (2022) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/OE.463044 |
| Popis: | Tunable light sources are a key enabling technology for many applications such as ranging, spectroscopy, optical coherence tomography, digital imaging and interferometry. For miniaturized laser devices, whispering gallery resonator lasers are a well-suited platform, offering low thresholds and small linewidths, however, many realizations suffer from the lack of reliable tuning. Rare-earth ion-doped lithium niobate offers a way to solve this issue. Here we present a single-frequency laser based on a neodymium-doped lithium niobate whispering gallery mode resonator that is tuned via the linear electro-optic effect. Using a special geometry, we suppress higher-order transverse modes and hence ensure single-mode operation. With an applied voltage of just $68\,$V, we achieve a tuning range of $3.5\,$GHz. The lasing frequency can also be modulated with a triangular control signal. The freely running system provides a frequency and power stability of better than $\Delta\nu =20\,$MHz and 6%, respectively, for a 30 minute period. This concept is suitable for full integration with existing photonic platforms based on lithium niobate. Comment: 18 pages, 5 figures |
| Databáze: | arXiv |
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