Residual timing noise from two synchronized diode pumped solid-state ytterbium-doped ultrafast laser oscillators is investigated. The lasers are passively mode-locked with a SESAM, which allows self-starting and stable laser operation coupled to a robust and cost-efficient design. A balanced optical cross-correlator is used to synchronize the laser repetition rates and to characterize their residual timing noise. The timing jitter measurement resolution is 8as and is limited by the cross-correlator photocurrent shot-noise. The integrated residual timing jitter is estimated to 73 as from 10 kHz to 31 MHz offset frequency. The timing jitter performance is limited by intracavity amplitude-noise-to-timing-noise conversion, mostly attributed to the SESAM. The timing jitter amounts to 4:5 fs when integrated from 10 Hz to 31 MHz because of excess technical noise contribution. This performance already makes the tested laser oscillator suitable for challenging time-resolved experiments setups.
Alexis Casanova, Benoît Trophème, Antoine Courjaud, and Giorgio Santarelli, "Sub-100-attosecond residual timing jitter from turn-key diode-pumped solid state mode-locked ytterbium lasers," Proc. SPIE 10511, Solid State Lasers XXVII: Technology and Devices, 105111C (Presented at SPIE LASE: January 31, 2018; Published: 15 February 2018); https://doi.org/10.1117/12.2290299.
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