Sub-Hz drift dominates full-band phase noise of the feed-forward system. This review models its mechanisms through phase-noise integration and transfer functions.
We critically review carrier-envelope phase stabilization of Er:Yb:glass mode-locked lasers, reproducing attosecond-level jitter and illustrating that millisecond-level upper-state lifetime limits bandwidth, forcing a hybrid feed-forward/feedback architecture and motivating fast intracavity actuation.
This paper derives the optimal Laguerre–Gaussian laser heater waist for microbunching suppression. Furthermore, we demonstrate that wavelength tuning up to μm remains effective for Free-Electron Lasers with proper parameter adjustments.
