A laser system for the spectroscopy of highly charged bismuth ions

作者：Albrecht S; Altenburg S; Siegel C; Herschbach N; Birkl G^*

来源：Applied Physics B: Lasers and Optics , 2012, 107(4): 1069-1074.

DOI：10.1007/s00340-011-4732-8

We present and characterize a laser system for the spectroscopy on highly charged Bi-209(82+) ions at a wavelength of 243.87 nm. For absolute frequency stabilization, the laser system is locked to a near-infra-red laser stabilized to a rubidium transition line using a transfer cavity based locking scheme. Tuning of the output frequency with high precision is achieved via a tunable rf offset lock. A sample-and-hold technique gives an extended tuning range of several THz in the UV. This scheme is universally applicable to the stabilization of laser systems at wavelengths not directly accessible to atomic or molecular resonances. We determine the frequency accuracy of the laser system using Doppler-free absorption spectroscopy of Te-2 vapor at 488 nm. Scaled to the target wavelength of 244 nm, we achieve a frequency uncertainty of sigma (244 nm)=6.14 MHz (one standard deviation) over six days of operation.

• 出版日期2012-6