A frequency-doubled laser system producing ns pulses for rubidium manipulation

Dingjan, J.; Darquie, B.; Beugnon, J.; Jones, M.P.A.; Bergamini, S.; Messin, G.; Browaeys, A. and Grangier, P. (2006). A frequency-doubled laser system producing ns pulses for rubidium manipulation. Applied Physics B, 82(1) pp. 47–51.

DOI: https://doi.org/10.1007/s00340-005-2027-7

Abstract

We have constructed a pulsed laser system for the manipulation of cold ⁸⁷Rb atoms. The system combines optical telecommunications components and frequency doubling to generate light at 780 nm. Using a fast, fibre-coupled intensity modulator, we sliced output from a continuous laser diode into pulses with a length between 1.3 and 6.1 ns and a repetition frequency of 5 MHz. These pulses are amplified using an erbium-doped fibre amplifier, and frequency-doubled in a periodically poled lithium niobate crystal, yielding a peak power up to 12 W. Using the resulting light at 780 nm, we demonstrate Rabi oscillations on the F=2,m_F=+2↔F′=3, m′_F=+3-transition of a single ⁸⁷Rb atom.

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