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Q: Fachverband Quantenoptik und Photonik
Q 25: Poster: Quantum Optics and Photonics I
Q 25.16: Poster
Tuesday, March 12, 2019, 16:30–18:30, S Atrium Informatik
Laser using narrow band intercombination line of Calcium — •Torben Laske, Hannes Winter, and Andreas Hemmerich — Institut für Laserphysik
We present our setup for realizing a superradiant laser [1] similar to the proposal to [2] using the narrow Calcium intercombination line 41S0 ↔ 43P1 as the laser transition. Such a laser operates in the bad-cavity regime, in which the coherence is not stored in the intra cavity light field but in the gain medium. We are able to prepare a pure ensemble of 3P1-Atoms (i.e. full inversion) trapped inside the cavity mode. By measuring the subsequent photon emission rate behind the cavity, we analyze the atomic decay. The observation of smaller decay times (76 µ s) than the natural lifetime of the 3P1 state (431 µ s) is an indication for superradiance.
[1] M. Holland and J. Thompson et al. Nature, 484(7392):78-81, (2012). [2] M. Holland et al., Phys. Rev. Lett. 102(16):163601, (2009).