Hannover 2020 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 22: Poster Session - Atomic Physics III
A 22.12: Poster
Mittwoch, 11. März 2020, 16:00–18:00, Empore Lichthof
Laser linewidth and phase noise measurements for EIT — •Carlos Brandl1, Annika Tebben1, Clément Hainaut1, André Salzinger1, David Grimshandl1, Sebastian Geier1, Titus Franz1, Nithiwadee Thaicharoen1, Gerhard Zürn1, and Matthias Weidemüller1,2 — 1Physikalisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany — 2National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, and CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China
For experiments on electromagnetically induced transparency (EIT) with Rydberg atoms a narrow laser linewidth is desirable to achieve a full EIT transmission on two photon resonance and a wider EIT linewidth, which scales inversely with the laser linewidth. Moreover, the knowledge of the laser linewidth allows for a direct comparison between EIT measurements and theoretical models. Therefore, using a self-heterodyne setup, we can measure the linewidth and the phase noise components - white noise, flicker noise and random walk noise - of a 780nm laser, which is used as one of the two lasers in our Rydberg EIT scheme with 87Rb. Furthermore, the setup is mounted on a mobile panel to easily extend the measurement to other lasers.