Three-Signal Temporal-Mode Selective Upconversion Demultiplexing

Silver, Michael; Huang, Yu‐Ping; Langrock, Carsten; Fejer, M. M.; Kumar, Prem; Kanter, Gregory S.

doi:10.1109/lpt.2019.2944636

Cited by 6 publications

(1 citation statement)

References 19 publications

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“…In our current quantum pulse gate implementation, the four modes are measured sequentially. This is not a fundamental limitation of the device; with a multiplexing scheme one can measure many modes in parallel, which can enable a singleshot multiparameter estimation [35]. To collect statistics, each setting of input pulses and gating pulses was measured 100 times, with a total measurement time of 2 microsecond per setting.…”

Section: Methodsmentioning

confidence: 99%

Achieving the ultimate quantum timing resolution

Ansari,

Brecht,

Gil-López

et al. 2020

Preprint

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Accurate time-delay measurement is at the core of many modern technologies. Here, we present a temporalmode demultiplexing scheme that achieves the ultimate quantum precision for the simultaneous estimation of the temporal centroid, the time offset, and the relative intensities of an incoherent mixture of ultrashort pulses at the single-photon level. We experimentally resolve temporal separations ten times smaller than the pulse duration, as well as imbalanced intensities differing by a factor of 10 2 . This represents an improvement of more than an order of magnitude over the best standard methods based on intensity detection.

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Section: Methodsmentioning

confidence: 99%

Achieving the ultimate quantum timing resolution

Ansari,

Brecht,

Gil-López

et al. 2020

Preprint

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Compact all-fiber quantum-inspired LiDAR with over 100 dB noise rejection and single photon sensitivity

Liu,

Qin,

Papangelakis

et al. 2023

Nat Commun

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Entanglement and correlation of quantum light can enhance LiDAR sensitivity in the presence of strong background noise. However, the power of such quantum sources is fundamentally limited to a stream of single photons and cannot compete with the detection range of high-power classical LiDAR transmitters. To circumvent this, we develop and demonstrate a quantum-inspired LiDAR prototype based on coherent measurement of classical time-frequency correlation. This system uses a high-power classical source and maintains the high noise rejection advantage of quantum LiDARs. In particular, we show that it can achieve over 100dB rejection (with 100ms integration time) of indistinguishable (with statistically identical properties in every degree of freedom) in-band noise while still being sensitive to single photon signals. In addition to the LiDAR demonstration, we also discuss the potential of the proposed LiDAR receiver for quantum information applications. In particular, we propose the chaotic quantum frequency conversion technique for coherent manipulation of high dimensional quantum states of light. It is shown that this technique can provide improved performance in terms of selectivity and efficiency as compared to pulse-based quantum frequency conversion.

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