Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/135155
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Type: | Journal article |
Title: | Picosecond-resolution single-photon time lens for temporal mode quantum processing |
Author: | Joshi, C. Sparkes, B.M. Farsi, A. Gerrits, T. Verma, V. Ramelow, S. Nam, S.W. Gaeta, A.L. |
Citation: | Optica, 2022; 9(4):364-373 |
Publisher: | Optica Publishing Group |
Issue Date: | 2022 |
ISSN: | 2334-2536 2334-2536 |
Statement of Responsibility: | Chaitali Joshi, Ben M. Sparkes, Alessandro Farsi, Thomas Gerrits, Varun Verma, Sven Ramelow, Sae Woo Nam, and Alexander L. Gaeta |
Abstract: | Techniques to control the spectro-temporal properties of quantum states of light at ultrafast time scales are crucial for numerous applications in quantum information science. In this work, we report an all-optical time lens for quantum signals based on Bragg-scattering four-wave mixing with picosecond resolution. Our system achieves a temporal magnification factor of 158 with single-photon level inputs, which is sufficient to overcome the intrinsic timing jitter of superconducting nanowire single-photon detectors. We demonstrate discrimination of two terahertz-bandwidth, single-photon-level pulses with 2.1 ps resolution (electronic jitter corrected resolution of 1.25 ps).We draw on elegant tools from Fourier optics to further show that the time-lens framework can be extended to perform complex unitary spectro-temporal transformations by imparting optimized temporal and spectral phase profiles to the input waveforms. Using numerical optimization techniques, we show that a four-stage transformation can realize an efficient temporal mode sorter that demultiplexes 10 Hermite–Gaussian (HG) modes. Our time-lens-based framework represents a new toolkit for arbitrary spectro-temporal processing of single photons, with applications in temporal mode quantum processing, high-dimensional quantum key distribution, temporal mode matching for quantum networks, and quantum-enhanced sensing with time-frequency entangled states. |
Rights: | © 2022 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
DOI: | 10.1364/optica.439827 |
Grant ID: | http://purl.org/au-research/grants/arc/DE170100752 |
Published version: | http://dx.doi.org/10.1364/optica.439827 |
Appears in Collections: | IPAS publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_135155.pdf | Published version | 5.64 MB | Adobe PDF | View/Open |
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