Fig. 5: Photocurrent pulse shaping for attosecond timing.
From: Attosecond electronic timing with rising edges of photocurrent pulses
a Concept of photocurrent pulse shaping for attosecond timing with both edges. BPD balanced photodiode, VOA variable optical attenuator. b Photocurrent pulse waveform (voltage across a 25-ohm impedance) of (i) positive photocurrent pulse (2 mA average current), (ii) negative photocurrent pulse (0.75 mA average current) and (iii) shaped photocurrent pulse with 50-ps delay. c Falling-edge timing jitter of shaped photocurrent pulses as a function of relative delay between positive and negative pulses. d Measured 50%-level timing jitter PSDs measured for case b (50-ps delay and 0.375 relative power ratio). (i) Falling-edge jitter before pulse shaping. (ii) Rising-edge jitter before pulse shaping. (iii) Falling-edge jitter after pulse shaping. (iv) EOS-TD measurement noise floor.
