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Projekt Druckansicht

Rippenwellenleiter in Lithiumniobat als Systemplatform für effiziente Laser und nichtlinear-optische Anwendungen

Antragsteller Professor Dr. Detlef Kip
Fachliche Zuordnung Optik, Quantenoptik und Physik der Atome, Moleküle und Plasmen
Förderung Förderung von 2016 bis 2020
Projektkennung Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 280878751
 
Erstellungsjahr 2020

Zusammenfassung der Projektergebnisse

In this project, we explored a new platform for ridge waveguides in lithium niobate based on a new method of optical-grade dicing and in-diffusion from three sides of the ridges. These waveguides promise attractive applications for the development of active devices and for use in nonlinear frequency conversion. Different dopants including Er, Nd, Yb, Pr, Dy, Th and Ho were used for the development of active devices, while Ti was in-diffused to form optical waveguides. Due to high-temperature annealing, very smooth surfaces were realized, allowing for low optical damping of about 0.1 dB/cm. We showed that optical gain, e.g. at 1531 nm wavelength for Er-doped waveguides, can be increased to 3.2 dB/cm, much higher than the best values of 2 dB/cm reported in the literature for channel waveguides. Continuous wave operation was achieved for Er, Nd and also Yb ridge waveguide lasers, with rather high slope efficiencies. By performing post-annealing electric-field assisted periodic poling of Ti-diffused ridge waveguides, high-efficiency quasi-phase matched nonlinear wavelength conversion has been demonstrated, too. Photorefractive effects that may degrade the optical performance of lithium niobate waveguides when pumped at high power in the visible or near infrared were strongly reduced by an additional thin ITO coating across the ridge waveguides.

Projektbezogene Publikationen (Auswahl)

 
 

Zusatzinformationen

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