English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We report on the development and performance evaluation of an ultra-stableclock laser for an $\rm ^{27}Al^+$ optical clock. The thermal noise limitedultra-stable laser is developed based on a 30 cm long ultra-stable cavity.Three independent evaluation methods, including the frequency noise summationmethod, the three-cornered hat (TCH) method, and the optical clock transitiondetection method, are used to evaluate the clock laser performance. Thesummation result of various frequency noise terms is compared with the resultof the TCH method. In addition, the $\rm ^{27}Al^+$ ion optical clocktransition with ultra-narrow linewidth is also used to detect the frequencynoise of the laser at lower Fourier frequencies. The results of the threemethods show good agreements, showing a frequency instability level of$1.3\times10^{-16}$, and giving us confidence that these evaluation methods mayprovides guidance for accurate evaluations of high stability laser sources.

Characterization of an $\rm ^{27}Al^+$ ion optical clock laser with three independent methods