Continuous-wave spontaneous lasing in mercury pumped by resonant two-photon absorption

Abstract

We demonstrate the first cw two-photon absorption laser-induced stimulated emission. The 7(1)S(0)-6(1)P(1) transition in mercury at a 1014 nm wavelength is used, and selective lasing of different isotopes is observed.

Rydberg excitation of trapped cold ions: a detailed case study

“…Therefore the UV wavelength is set close to the 6 1 S-6 3 P resonance and the VUV wavelength is set close to the 10 1 P and 11 1 P resonance, respectively. This triple resonant scheme enhances the four-wave mixing up to 4 orders of magnitude and establishes a continuous VUV laser source in the µW power range [48].…”

“…By choosing fundamental wavelengths close to resonances of mercury the FWM efficiency can be strongly enhanced. A laser source around 123 nm with power of a few µW should be feasible by using a triple resonant FWM scheme [48].…”

A reliable cw Lyman-α laser source for future cooling of antihydrogen

“…Due to the short lifetime of the 6 1 P state (1.5 ns) compared to the two-photon 7 1 S state (32 ns) a high enough two-photon excitation rate can establish a laser process on the 7 1 S-6 1 S transition at 1015 nm (see Figure 1(a)). This two-photon laser induced stimulated emission (TALISE) has been well investigated [24,25]. It does not influence the four-wave mixing process in this low loss (due to conversion) regime.…”

The Production and Study of Cold Antiprotons and Antihydrogen

“…Starting in the Hänsch Laboratory in Garching, and then moving to the Walz Laboratory in Mainz, our collaborators continue to improve a source of Lyman alpha radiation suitable for laser cooling and for 1s-2p spectrosocpy [46,47,48,49,50,51,52,53,54,55]. Four-wave mixing is used to generate continuous, coherent Lyman alpha radiation at 121.5 nm.…”