Integrated Optics in Astronomical Interferometry

Foresto, V. Coudé du

doi:10.1017/s0074180900107715

Cited by 8 publications

(1 citation statement)

References 21 publications

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“…Harnessing the temporal stability of the single-mode (SM) fiber's spatial profile output (close to the diffraction limit) as the spectrograph's input, is one of the solutions to making this task easier (e.g., Ref. [3][4][5][6]. However, the atmosphere limits the coherence of the light, forming a seeing disk instead of a diffraction limited point spread function (PSF) resulting in considerable coupling losses.…”

Section: Introductionmentioning

confidence: 99%

Optimizing astrophotonic spatial reformatters using simulated on-sky performance

Anagnos

Harris

Corrigan

et al. 2018

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III

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One of the most useful techniques in astronomical instrumentation is image slicing. It enables a spectrograph to have a more compact angular slit, whilst retaining throughput and increasing resolving power. Astrophotonic components like the photonic lanterns and photonic reformatters can be used to replace bulk optics used so far. This study investigates the performance of such devices using end-to-end simulations to approximate realistic onsky conditions. It investigates existing components, tries to optimize their performance and aims to understand better how best to design instruments to maximize their performance. This work complements the recent work in the field and provides an estimation for the performance of the new components.

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Section: Introductionmentioning

confidence: 99%

Optimizing astrophotonic spatial reformatters using simulated on-sky performance

Anagnos

Harris

Corrigan

et al. 2018

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III

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Environmental characterisation and stabilisation of a 2×200-meter outdoor fibre interferometer at the CHARA Array

et al. 2019

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Efficient injection from large telescopes into single-mode fibres: Enabling the era of ultra-precision astronomy

Jovanović

Schwab

Guyon

et al. 2017

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105

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In an attempt to develop a streamlined astrophotonic instrument, we demonstrate the realization of an all-photonic device capable of both multimode to single mode conversion and spectral dispersion on an 8-m class telescope with efficient coupling. The device was a monolithic photonic spectrograph which combined an integrated photonic lantern, and an efficient arrayed waveguide grating device. During on-sky testing, we discovered a previously unreported type of noise that made spectral extraction and calibration extremely difficult. The source of the noise was traced to a wavelength-dependent loss mechanism between the feed fiber's multimode near-field pattern, and the modal acceptance profile of the integrated photonic lantern. Extensive modeling of the photonic components replicates the wavelength-dependent loss, and demonstrates an identical effect on the final spectral output. We outline that this could be mitigated by directly injecting into the integrated photonic lantern.

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Integrated Optics in Astronomical Interferometry

Cited by 8 publications

References 21 publications

Optimizing astrophotonic spatial reformatters using simulated on-sky performance

Optimizing astrophotonic spatial reformatters using simulated on-sky performance

Environmental characterisation and stabilisation of a 2×200-meter outdoor fibre interferometer at the CHARA Array

Efficient injection from large telescopes into single-mode fibres: Enabling the era of ultra-precision astronomy

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