SAMOP 2021 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Information (joint session QI/Q)
Q 11.26: Poster
Mittwoch, 22. September 2021, 16:30–18:30, P
Construction of a reliable laser light source for resonant excitation of tin-vacany centers — •Franziska M. Herrmann1, Joseph H.D. Munns1, and Tim Schröder1,2 — 1Integrated Quantum Photonics, Institut für Physik, Humboldt-Universität zu Berlin, Berlin — 2Diamond Nanophotonics, Ferdinand-Braun-Institut, Berlin
Tin-vacancy colour centres in diamond are promising candidates for nodes in quantum networks, due to their suitable optical and spin properties. However, with a zero phonon line wavelength of 619 nm, resonant excitation cannot be achieved easily by commercially available and affordable laser systems. At 1238 nm however, suitable narrowband lasers are available and the targeted 619 nm can be reached by frequency doubling. The conversion is achieved based on second harmonic generation in an MgO:PPLN crystal pumped with infrared laser light. Here we introduce the setup and investigate the stability and tunability of this laser system and demonstrate how several PID controlled feedback loops can ensure usability for future quantum control applications.