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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report the implementation and performance of a double servo-loop forintensity and phase-difference active stabilization of a dual-frequencyvertical external--cavity surface-emitting laser (DF-VECSEL) for coherentpopulation trapping (CPT) of cesium atoms in the framework of compact atomicclocks. In--phase fully correlated pumping of the two laser modes is identifiedas the best scheme for intensity noise reduction, and an analytical modelallows the optimization of the active stabilization strategy. Opticalphase-locking the beat-note to a local oscillator leads to a phase noise levelbelow -103~dBc/Hz at 100~Hz from the carrier. The laser contribution to theshort-term frequency stability of the clock is predicted to be compatible witha targeted Allan deviation below $\sigma_y = 5\,\times 10^{-13}$ over onesecond.

Optimization of laser dynamics for active stabilization of DF--VECSELs dedicated to cesium CPT clocks