SWhat changed
Jones and colleagues used an octave-spanning mode-locked laser spectrum and self-referencing to stabilize the pulse-to-pulse carrier-envelope phase and the optical frequency comb. They checked relative phase control with a time-domain cross-correlator and measured a rubidium optical reference against a microwave clock.
Scientific scope
Jones and colleagues used an octave-spanning mode-locked laser spectrum and self-referencing to stabilize the pulse-to-pulse carrier-envelope phase and the optical frequency comb. They checked relative phase control with a time-domain cross-correlator and measured a rubidium optical reference against a microwave clock. The measured quantity is the relative carrier-envelope phase from pulse to pulse, not an independently determined absolute phase. Time-domain correlation had a phase offset attributed by the authors to correlator asymmetry and substantially greater measurement uncertainty than the frequency-domain method. The optical frequency measurement depends on the microwave reference and prior line identification. Four printed authors were marked as equal contributors. A separately recorded microwave–optical frequency-link demonstration shares related comb methods; this record concerns carrier-envelope phase stabilization and does not claim the full later frequency-metrology programme.
Evidence
The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. The measured quantity is the relative carrier-envelope phase from pulse to pulse, not an independently determined absolute phase. Time-domain correlation had a phase offset attributed by the authors to correlator asymmetry and substantially greater measurement uncertainty than the frequency-domain method. The optical frequency measurement depends on the microwave reference and prior line identification. Four printed authors were marked as equal contributors. A separately recorded microwave–optical frequency-link demonstration shares related comb methods; this record concerns carrier-envelope phase stabilization and does not claim the full later frequency-metrology programme.
Contributors
- The named authors in the research record · SCIENCE: These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
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