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Q: Fachverband Quantenoptik und Photonik
Q 54: Poster 3
Q 54.15: Poster
Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II
Power scaling of an all-solid-state laser source for trapping lithium — •Andrea Bergschneider, Ulrich Eismann, Frédéric Chevy, and Christophe Salomon — Laboratoire Kastler Brossel, CNRS UMR 8552, UPMC, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris, France
We recently presented an all-solid-state laser source emitting 670 mW of narrowband 671-nm light, frequency-locked to the lithium D-line transitions for laser cooling applications [1]. It consists of a solid-state Nd:YVO4 ring laser emitting light of 1342 nm wavelength, which is subsequently frequency-doubled in an enhancement cavity using periodically-polarized potassium titanyl phosphate (ppKTP). Meanwhile, a power of about 800 mW has been achieved.
Here, we focus on the challenge of increasing the output power into the multi-Watt range. The key issue is the minimization of unavoidable detrimental thermal effects in the Nd:YVO4 and the nonlinear crystal. We discuss in detail the theoretical optimization of the spatial overlap between pump beam and cavity mode while keeping a TEM00-mode [2]. We experimentally alter the pump beam wavelength and size as well as the crystal doping and length and compare to theoretical results. We also investigate intra-cavity second harmonic generation.
[1] U. Eismann et al., arXiv:1103.5841 (2011)
[2] Y. F. Chen et al., IEEE J. Quantum Electron. 33, 1424 (1997)