Abstract

The Nd:YAG ⁴F_3/2−⁴I_9/2 laser transition is investigated by use of diode pumping. A tuning range of λ = 945.46(2)−946.27(2) nm was achieved. A resonator was used with two foci for the laser crystal and the frequency-doubling crystal. The setup resulted in a single-mode output power of 100 mW at 473 nm. The laser radiation was also frequency quadrupled to the UV by use of an external enhancement cavity. The laser frequency was locked to an external cavity, resulting in a laser linewidth of 460 Hz. The use of the laser to excite the 5s^{2 1}S₀−5s5p ³P₀ line of a single stored In⁺ ion as the basis of a frequency standard is discussed.

© 1994 Optical Society of America

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