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Q: Fachverband Quantenoptik und Photonik
Q 24: Quantum Effects
Q 24.2: Poster
Tuesday, March 15, 2022, 16:30–18:30, P
Stabilization schemes for a Laser System at 546.1nm used in a Lasing without Inversion experiment in Mercury — •Noah Eizenhöfer, Daniel Preißler, and Thomas Walther — TU Darmstadt, Institut für Angewandte Physik, AG Laser und Quantenoptik, Schlossgartenstr. 7, D-64289 Darmstadt
Lasing without Inversion (LWI) is an alternative concept to generate radiation in the (V)UV regime. It is based on coherent effects leading to a suppression of the absorption on the lasing transition. This overcomes the problem of conventional lasers in the UV regime since their necessary pump power scales with f4. A LWI experiment can be realized in Mercury with possible resulting wavelengths at 185 nm and 253.7 nm. (1)
One of the most important requirements for achieving LWI in mercury is the use of two driving lasers at 435.8 nm and 546.1 nm with very narrow bandwidths. The current status of the coupling laser at 546.1 nm is presented. The system is based on the generation of the second harmonic of the radiation from an ECDL. The feasibility of different schemes for the stabilization of the system to the corresponding atomic transition, e.g. Polarization Spectroscopy and Modulation Transfer Spectroscopy, is evaluated.
(1) Fry et al.: "Four-level atomic coherence and cw VUV lasers". Optics Communications 179 (2000), 499-504