标题： 用于高电荷铋离子光谱学的激光系统 显示英文标题

标题： A Laser System for the Spectroscopy of Highly-Charged Bismuth Ions

摘要： 我们提出并表征了一种用于在243.87 nm波长下对高度电离的^209Bi^82+离子进行光谱分析的激光系统。 为了实现绝对频率稳定，该激光系统通过基于转移腔的锁定方案锁定到一个稳定在铷原子跃迁线上的近红外激光。 通过可调谐射频偏置锁定实现了输出频率的高精度调节。 采用采样保持技术，在紫外波段实现了几太赫兹的扩展调谐范围。 该方案普遍适用于那些无法直接利用原子或分子共振的波长下的激光系统稳定。 我们使用488 nm波长下Te_2蒸气的无多普勒吸收光谱来确定激光系统的频率精度。 将结果扩展到目标波长244 nm，我们在六天的运行中实现了频率不确定度为\sigma _{244nm}= 6.14 MHz（一个标准偏差）。 显示英文摘要

摘要： We present and characterize a laser system for the spectroscopy on highly-charged ^209Bi^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 vapour at 488 nm. Scaled to the target wavelength of 244 nm, we achieve a frequency uncertainty of \sigma_{244nm} = 6.14 MHz (one standard deviation) over six days of operation.