Nanosecond gating of superconducting nanowire single-photon detectors using cryogenic bias circuitry.
Opt Express
; 31(1): 610-625, 2023 Jan 02.
Article
em En
| MEDLINE
| ID: mdl-36606996
ABSTRACT
Superconducting nanowire single-photon detectors (SNSPDs) show near unity efficiency, low dark count rate, and short recovery time. Combining these characteristics with temporal control of SNSPDs broadens their applications as in active de-latching for higher dynamic range counting or temporal filtering for pump-probe spectroscopy or LiDAR. To that end, we demonstrate active gating of an SNSPD with a minimum off-to-on rise time of 2.4â
ns and a total gate length of 5.0â
ns. We show how the rise time depends on the inductance of the detector in combination with the control electronics. The gate window is demonstrated to be fully and freely, electrically tunable up to 500â
ns at a repetition rate of 1.0â
MHz, as well as ungated, free-running operation. Control electronics to generate the gating are mounted on the 2.3â
K stage of a closed-cycle sorption cryostat, while the detector is operated on the cold stage at 0.8â
K. We show that the efficiency and timing jitter of the detector is not altered during the on-time of the gating window. We exploit gated operation to demonstrate a method to increase in the photon counting dynamic range by a factor 11.2, as well as temporal filtering of a strong pump in an emulated pump-probe experiment.
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MEDLINE
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article