aiqbench analysis
This is a quantum-optics imaging result: photon pairs let a 1550 nm infrared measurement be read out with a visible-to-near-infrared detector, avoiding costly cryogenic infrared cameras. The reported spectral resolution (about 730 to 1460) and the zebrafish larva transmission test are modest, proof-of-principle demonstrations rather than a deployment-ready system. Readers interested in quantum sensing should watch whether the approach scales beyond a lab setup.
High Resolution Hyperspectral Quantum Infrared Imaging with Undetected Photons
arXiv:2610.32292v1 Announce Type: new Abstract: Quantum sensing in the infrared regime often demands the use of expensive and cryogenically operated detectors. Nonlinear interferometry has paved the way for information transfer from the infrared to the near--infrared or visible regime in various quantum technologies. A particularly interesting application of these interferometers involves spectrally--resolved quantum imaging using undetected photons, enabled by the use of temperature--tunable parametric amplifiers. In this work, we demonstrate spectrally resolved transmission imaging with undetected photons around 1550 nm using a spontaneous parametric down conversion based folded nonlinear interferometric scheme, registering the attenuation of a zebrafish larva as a biological feasibility test. We characterize and calibrate the interferometer, having achieved spectrally resolved interference fringes with a maximum baseline visibility of $\sim 74\%$ in the near--infrared regime. Phase--stepped readout of a grating spectrometer gives a resolving power of $\sim1460$ (from the spectrometer's point spread function) at 1550 nm, and $\sim 730$ from the coherence length, the finest reported for imaging with undetected photons, over an instantaneous spectral window of $\approx 51$ cm$^{-1}$.
Abstract:Quantum sensing in the infrared regime often demands the use of expensive and cryogenically operated detectors. Nonlinear interferometry has paved the way for information transfer from the infrared to the near--infrared or visible regime in various quantum technologies. A particularly interesting application of these interferometers involves spectrally--resolved quantum imaging using undetected photons, enabled by the use of temperature--tunable parametric amplifiers. In this work, we demonstrate spectrally resolved transmission imaging with undetected photons around 1550 nm using a spontaneous parametric down conversion based folded nonlinear interferometric scheme, registering the attenuation of a zebrafish larva as a biological feasibility test. We characterize and calibrate the interferometer, having achieved spectrally resolved interference fringes with a maximum baseline visibility of $\sim 74\%$ in the near--infrared regime. Phase--stepped readout of a grating spectrometer gives a resolving power of $\sim1460$ (from the spectrometer's point spread function) at 1550 nm, and $\sim 730$ from the coherence length, the finest reported for imaging with undetected photons, over an instantaneous spectral window of $\approx 51$ cm$^{-1}$.
Quantum Physics (quant-ph); Optics (physics.optics)
arXiv:2610.32292 [quant-ph]
(or arXiv:2610.32292v1 [quant-ph] for this version)
https://doi.org/10.48550/arXiv.2610.32292 Focus to learn more arXiv-issued DOI via DataCite (pending registration)
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Full text under the publisher's open licence · 263 words
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