Jitter of 3-cycle laser pulses from a gas-filled capillary - Single shot SPIDER pulse characterization at 1 kHz

Sub-10-fs millijoule-level pulses. are usually generated in gas-filled capillaries with subsequent compression. Is the phase-structure preserved in this process? We present results from a preliminary investigation, and observe remarkably low mean shot-to-shot pulse duration variations (21 as).