In-lab ALOHA mid-infrared up-conversion interferometer with high fringe contrast @λ = 3.39 μm

Szemendera, Ludovic; Darré, Pascaline; Baudoin, Romain; Grossard, Ludovic; Delage, Laurent; Herrmann, Harrald; Silberhorn, Christine; Reynaud, François

doi:10.1093/mnras/stw196

Cited by 13 publications

(7 citation statements)

References 6 publications

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“…The long term development will be focused to longer wavelengths ranging from 3 to 12 µm, corresponding to the astronomical L, M and N bands. We obtained first promising in-lab results at 3.39 µm [18]. In this context, the ALOHA concept is of particular interest and offers several advantages.…”

Section: Discussionmentioning

confidence: 76%

First On-Sky Fringes with an Up-Conversion Interferometer Tested on a Telescope Array

et al. 2016

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The Astronomical Light Optical Hybrid Analysis project investigates the combined use of a telescope array interferometer and nonlinear optics to propose a new generation of instruments dedicated to high-resolution imaging for infrared astronomy. The nonlinear process of optical frequency conversion transfers the astronomical light to a shorter wavelength domain. Here, we report on the first fringes obtained on the sky with the prototype operated at 1.55 μm in the astronomical H band and implemented on the Center for High Angular Resolution Astronomy telescope array. This seminal result allows us to foresee a future extension to the challenging midinfrared spectral domain.

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Section: Discussionmentioning

confidence: 76%

First On-Sky Fringes with an Up-Conversion Interferometer Tested on a Telescope Array

et al. 2016

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“…-First fringes at 3.39 μm have been obtained in laboratory in monochromatic and in high flux configuration using a MIR HeNe laser as a source, and PPLN crystals in the non-linear stages [13]. -In a second step, the laser source was attenuated to operate the experiment in the photon counting regime (Fig.…”

Section: Feasibility and First Experimental Resultsmentioning

confidence: 99%

ALOHA—Astronomical Light Optical Hybrid Analysis

et al. 2018

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This paper gives an overview of the Astronomical Light Optical Hybrid Analysis (ALOHA) project dedicated to investigate a new method for high resolution imaging in mid infrared astronomy. This proposal aims to use a non-linear frequency conversion process to shift the thermal infrared radiation to a shorter wavelength domain compatible with proven technology such as guided optics and detectors. After a description of the principle, we summarise the evolution of our study from the high flux seminal experiments to the latest results in the photon counting regime.

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“…More recently, ALOHA has been implemented in the L band with preliminary results in the high flux (Szemendera et al 2016) and in the photon counting regime with a monochromatic source (Szemendera et al 2017). Over all these studies, the operating conditions of the non-linear process result in an intrinsic spectral selectivity without the addition of any spectrograph.…”

Section: Introductionmentioning

confidence: 99%

Multichannel spectral mode of the ALOHA up-conversion interferometer

Lehmann

Darré

Boulogne

et al. 2018

Monthly Notices of the Royal Astronomical Society

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In this paper, we propose a multichannel spectral configuration of the Astronomical Light Optical Hybrid Analysis (ALOHA) instrument dedicated to high resolution imaging. A frequency conversion process is implemented in each arm of an interferometer to transfer the astronomical light to a shorter wavelength domain. Exploiting the spectral selectivity of this non-linear optical process, we propose to use a set of independent pump lasers in order to simultaneously study multiple spectral channels. This principle is experimentally demonstrated with a dual-channel configuration as a proof-of-principle.

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In-lab ALOHA mid-infrared up-conversion interferometer with high fringe contrast @λ = 3.39 μm

Cited by 13 publications

References 6 publications

First On-Sky Fringes with an Up-Conversion Interferometer Tested on a Telescope Array

First On-Sky Fringes with an Up-Conversion Interferometer Tested on a Telescope Array

ALOHA—Astronomical Light Optical Hybrid Analysis

Multichannel spectral mode of the ALOHA up-conversion interferometer

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