100 times faster noise reduction

_{Figure 1: Intra-pulse DFG. Each pulse is broadened individually and for each pulse fCEO is cancelled individually.}

• DFG is taken for each pulse individually (intra-pulse DFG)
• All-optical phase-lock
• Not limited by bandwidth of electronic feedback
• Two orders of magnitude faster than any other f_CEO lock
• Simpler, no feedback loop involved
• More reliable

Each laser pulse is travelling through the amplifier chain, non-linear fiber and DFG unit individually. This means each pulse is broadened to a super continuum individually and the Difference Frequency is taken from the edges of the spectrum of a single pulse. This means f_CEO is canceled for each pulse individually. The f_CEO stabilization has therefore an effective locking bandwidth of the repetition rate (200 MHz), two orders of magnitude faster than any other method.

This is why the DFC CORE + has an unrivaled ultra low Carrier-Envelope Phase Noise CEP.