Towards a mid-infrared <i>L</i> band up-conversion interferometer: first on-sky sensitivity test on a single arm

Lehmann, Lucien; Grossard, Ludovic; Delage, Laurent; Reynaud, François; Chauvet, Mathieu; Bassignot, Florent; Martinache, Frantz; Morand, F.; Rivet, J. P.; Schmider, F. X.; Vernet, David

doi:10.1093/mnras/stz729

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…3. The future of up-conversion technologies pioneered by the group of François Reynaud (see for instance Lehmann et al 55 ) may also bring further novelty, unfortunately not addressed here. Finally, I fully concentrated here on prospects for ground-based observations, whereas it is likely that one the strongest potential of astrophotonics is in space due to obvious small-scale integration capabilities.…”

Section: Discussionmentioning

confidence: 99%

A report on the status of astrophotonics for optical/IR interferometry and beyond

Labadie

2022

Optical and Infrared Interferometry and Imaging VIII

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Long-baseline interferometry and high-resolution spectroscopy are two examples of areas that have benefited from astrophotonics devices, but the application range is expanding to other subareas and other wavelength ranges.The VLTI has been one of the pioneering astronomical infrastructure to exploit the potential of astrophotonics instrumentation for high-angular resolution interferometric observations, whereas new opportunities will arise in the context of the future ELTs. In this contribution, I review the current state of the art regarding the interplay between photonic-based solutions and astronomical instrumentation and highlight the growth of the field, as well as its recognition in recent strategy surveys such as the Decadal. I will explain the benefits of different technological platforms making use of photolithography or laser-writing techniques. I will review the most recent results in the field covering simulations, laboratory characterization and on-sky prototyping. Astrophotonics may have a unique role to play in the forthcoming era of new ground-based astronomical facilities, and possibly in the field of space science.

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Section: Discussionmentioning

confidence: 99%

A report on the status of astrophotonics for optical/IR interferometry and beyond

Labadie

2022

Optical and Infrared Interferometry and Imaging VIII

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“…On-sky tests were also performed at 3.5 µm on a single interferometric arm. Starlight up to magnitude L mag = 2.8 at 3.5 µm was successfully detected after conversion to 820 nm in a PPLN ridge waveguide [590].…”

Section: Statusmentioning

confidence: 97%

2023 Astrophotonics Roadmap: pathways to realizing multi-functional integrated astrophotonic instruments

Jovanovic,

Gatkine,

Anugu

et al. 2023

J. Phys. Photonics

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Photonic technologies offer numerous functionalities that can be used to realize astrophotonic instruments. The most spectacular example to date is the ESO Gravity instrument at the Very Large Telescope in Chile that combines the light-gathering power of four 8-m telescopes through a complex photonic interferometer. Fully integrated astrophotonic devices offer critical advantages for instrument development, including extreme miniaturization when operating at the diffraction-limit, plus integration, superior thermal and mechanical stabilization owing to the small footprint, and high replicability offering significant cost savings. Numerous astrophotonic technologies have been developed to address shortcomings of conventional instruments to date, including the development of photonic lanterns to convert from multimode inputs to single mode outputs, complex aperiodic fiber Bragg gratings to filter OH emission from the atmosphere, beam combiners enabling long baseline interferometry with for example, ESO Gravity, and laser frequency combs for high precision spectral calibration of spectrometers. Despite these successes, the facility implementation of photonic solutions in astronomical instrumentation is currently limited because of 1) low throughputs from coupling to fibers, coupling fibers to chips, propagation and bend losses, device losses, etc., 2) difficulties with scaling to large channel count devices needed for large bandwidths and high resolutions, and 3) efficient integration of photonics with detectors. In this roadmap, we identify 23 key areas that need further development. We outline the challenges and advances needed across those areas covering design tools, simulation capabilities, fabrication processes, the need for entirely new components, integration and hybridization and the characterization of devices. To realize these advances the astrophotonics community will have to work cooperatively with industrial partners who have more advanced manufacturing capabilities. With the advances described herein, multi-functional integrated instruments will be realized leading to novel observing capabilities for both ground and space based platforms, enabling new scientific studies and discoveries.

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“…Whether in waveguide or free-space systems, extending quantum technology to this band is very promising. Another reason for interest in the MIR band is its close correlation with thermal radiation from room-temperature and high-temperature objects, which provides an effective means of thermal imaging ( 22 , 23 ).…”

Section: Introductionmentioning

confidence: 99%

Quantum entanglement and interference at 3 μm

Ge,

Han,

Yang

et al. 2024

Sci. Adv.

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Given the important advantages of the mid-infrared optical range (2.5 to 25 μm) for biomedical sensing, optical communications, and molecular spectroscopy, extending quantum information technology to this region is highly attractive. However, the development of mid-infrared quantum information technology is still in its infancy. Here, we report on the generation of a time-energy entangled photon pair in the mid-infrared wavelength band. By using frequency upconversion detection technology, we observe the two-photon Hong-Ou-Mandel interference and demonstrate the time-energy entanglement between twin photons at 3082 nm via the Franson-type interferometer, verifying the indistinguishability and nonlocality of the photons. This work is very promising for future applications of optical quantum technology in the mid-infrared band, which will bring more opportunities in the fields of quantum communication, precision sensing, and imaging.

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Towards a mid-infrared L band up-conversion interferometer: first on-sky sensitivity test on a single arm

Cited by 5 publications

References 14 publications

A report on the status of astrophotonics for optical/IR interferometry and beyond

A report on the status of astrophotonics for optical/IR interferometry and beyond

2023 Astrophotonics Roadmap: pathways to realizing multi-functional integrated astrophotonic instruments

Quantum entanglement and interference at 3 μm

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