Can you explain the sensitivity on the long term performance of the venteon CEP5 to beam pointing stability? Is the maximum beat signal stable?

The venteon interferometers do not use small apertures in their setup, so beam pointing that would translate to a fluctuating power level of the CEP beat signal is not critical for the venteon CEP5 approach and does not need any stricter requirements compared to other techniques. Also, the signal power is not sensitive to temperature drifts or misalignment. In terms of stability, the CEP stabilized laser system (the pump laser and femtosecond oscillator) and f-to-2f interferometer are each built on an all-water-cooled monolithic breadboard, so thermal drifts are minimised as much as possible for those systems.

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