An optical frequency standard, based on the 2{sup left}S{sub}(1/2) - 2{sup left}D{sub}(5/2) transition in 674 nm in 88{sup left}Sr{sup}+, has been characterized and the frequency measured with a femtosecond laser comb. Progress on developing a standard based on 87{sup left}Sr{sup}+ will also be reported.
展开▼
机译：基于88 {sup left} sr {sup的2 {sup left} s {sub}（1/2） - 2 {sup left} d {sub}（5/2）转换中的光学频率标准} +，已经表征，频率用飞秒激光梳测量。还将报告基于87 {sup} sr {sup} +的基于87 {sup} {sup} +的标准的进展。
展开▼
