Frequency comb generation via cascaded second-order nonlinearities in microresonators
| Autor: | Szabados, Jan, Puzyrev, Danila N., Minet, Yannick, Reis, Luis, Buse, Karsten, Villois, Alberto, Skryabin, Dmitry V., Breunig, Ingo |
|---|---|
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 124, 203902 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.124.203902 |
| Popis: | Optical frequency combs are revolutionising modern time and frequency metrology. In the past years, their range of applications has increased substantially, driven by their miniaturisation through microresonator-based solutions. The combs in such devices are typically generated using the third-order $\chi^{(3)}$-nonlinearity of the resonator material. An alternative approach is making use of second-order $\chi^{(2)}$-nonlinearities. While the idea of generating combs this way has been around for almost two decades, so far only few demonstrations are known, based either on bulky bow-tie cavities or on relatively low-$Q$ waveguide resonators. Here, we present the first such comb that is based on a millimetre-sized microresonator made of lithium niobate, that allows for cascaded second-order nonlinearities. This proof-of-concept device comes already with pump thresholds as small as 2 mW, generating repetition-rate-locked combs around 1064 nm and 532 nm. From the nonlinear dynamics point of view, the observed combs correspond to the Turing roll patterns. Comment: Article with supplementary information, 12 pages, 8 figures. V2 contains few missing umlauts |
| Databáze: | arXiv |
| Externí odkaz: |
|