Natural Linewidth of the 401-nm Laser-Cooling Transition in Er I

J. J. McClelland

Physical Review A 73(6), 064502 (2006).

Abstract:

A measurement of the natural linewidth of the 401 nm 4f¹²6s² (³H₆) → 4f¹²(³H)6s6p (¹P^o₁) (6,1)₇^o transition in Er I is presented. Using laser-induced fluorescence in an atomic beam, a linewidth of (36.0 ± 1.2) MHz is observed, a value that differs significantly from the accepted literature value of 28 MHz. This measurement provides an accurate determination of an essential laser cooling parameter that plays a central role in the development of novel laser cooling applications using Er atoms.

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