公开(公告)号：US20240183709A1

公开(公告)日：2024-06-06

申请号：US18287829

申请日：2022-04-20

Applicant: THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE

Inventor： Shu-Wei HUANG ,  Bowen LI

IPC: G01J1/44 ,  G01J3/18 ,  G01J3/28

CPC classification number: G01J1/44 ,  G01J3/1895 ,  G01J3/2803 ,  G01J2001/442

Abstract: A time-to-frequency converter transforms an initial single-photon pulse into a transformed pulse such that the temporal waveform of the initial pulse is mapped to the spectrum of the transformed pulse. The time-to-frequency converter includes a dispersive optical element followed by a time lens. The spectrum of the transformed pulse is then measured to determine the arrival time of the initial pulse. The spectrum can be measured using a photon-counting spectrometer that spatially disperses the transformed pulse onto an single-photon detector array. Alternatively. an additional dispersive element can be used with the time-to-frequency converter to implement a time magnifier. The arrival time of the resulting time-magnified pulse can then be measured using time-correlated single-photon counting. This arrival time can then be divided by the magnification factor of the time magnifier to obtain the arrival time of the initial pulsc.