Frequency stabilization of multiple lasers and Rydberg atom spectroscopy

K. Nakayama, Masayuki Hyodo, R. Ohmukai +1 more

Pierre Thoumany, Theodor W. Hänsch, Gernot Stania +2 more

We demonstrate Doppler-free, purely optical detection of laser-excited rubidium Rydberg atoms in a room-temperature gas cell. The Rydberg atoms are excited with a frequency-doubled dye laser at 297 nm in a single-excitation step from the ground state; the detection is performed with a 780 nm diode laser in a scheme similar to electron shelving. Laser spectroscopy of Rydberg transitions is demonstrated, and a frequency-doubled dye is stabilized to one Rydberg transition in the UV. The performance of this stabilization is measured with an atomic-beam apparatus and a time of flight experiment.

Д.Ф. Зарецкий, M. M. Yudkevich

David H. Meyer, Paul D. Kunz, Neal Solmeyer

We demonstrate modulation-free laser stabilization to an atomic Rydberg transition using nonlinear polarization spectroscopy. To stabilize a laser to the upper transition of a three-level ladder scheme, the techniques of standard polarization spectroscopy are adapted to use a narrow, nonlinear coherence feature. We obtain a subnatural linewidth dispersive signal that is directly suitable for laser frequency stabilization. We examine the effect of laser polarization on the dispersive line shape. This technique stabilizes the laser to an absolute frequency reference, can be used with numerous Rydberg levels, and eliminates laser modulation, which can enable high bandwidth feedback.

陈肖含 CHEN Xiao-han, 师雪荣 SHI Xue-rong, 贾玥 JIA Yue +3 more

A. Schnitzer, K. Hollenberg, Wolfgang Behmenburg