Extended Data Fig. 6: Time of arrival histograms with a translating mirror.
From: Demonstration of sub-3 ps temporal resolution with a superconducting nanowire single-photon detector
By replacing the target with a translating mirror a, shows the resulting instrument response function fit with the mirror at different positions, demonstrating that an accurate time of arrival can be extracted. The full system jitter was 6.2 ps. The mirror position was swept and the laser pulse return time was extracted by using either the first b, 1000 detected photons or c, 20 detected photons. Using fewer photons increases the position uncertainty, however, millimetre accuracy is still possible even with 20 detected photons.
