A system of three external cavity diode lasers is used to excite Rydberg states in rubidium. The 5S -> 5P -> 5D transitions are driven using lasers with lambda = 780 and 776 nm respectively. From the 5D state, atoms fluoresce down to the 6P state. The final transition to Rydberg levels is from the 6P state with laser light near lambda = 1016 nm. The nS and nD Rydberg states are accessible directly and with the application of a modest electric field nP states can also be excited. As a test of this system, Stark spectra are collected for nD and nP states. (C) 2011 Optical Society of America
This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-18-17002. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
D.P. Fahey and M.W. Noel, Optics Express 19, 17002 (2011).