Dynamic short- and large-coherence interferometry to characterize the induced vibrations and topology change of the cryogenic mirror of the Einstein Telescope prototype

Jesús Vilaboa  Pérez; J.J.D. Loicq

Dynamic short- and large-coherence interferometry to characterize the induced vibrations and topology change of the cryogenic mirror of the Einstein Telescope prototype

Jesús Vilaboa Pérez, J.J.D. Loicq

Spaceborne Instrumentation

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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Abstract

The E-TEST project builds a prototype for the Einstein Telescope (ET). ET is a proposed gravitational-wave observatory. E-TEST includes a silicon mirror of 30 cm up to 40 cm diameter, suspended and cooled down at cryogenic temperatures from 20 K to 30 K. During the cooling down, the mirror will be affected by surface topology changes, wavefront deformation, and induced vibrations. We present a metrology device based on short-coherence interferometry to characterize the mirror surface with a sub-nanometer resolution. We design an innovative phase mask to achieve dynamic or single-frame white light interferometry. Moreover, we discuss different interferogram analysis methods. We also discuss the implementation of a long-coherence source to facilitate the measurements with the low-coherence source.

Original language	English
Title of host publication	SPIE 12137: Optics and Photonics for Advanced Dimensional Metrology II
Publisher	SPIE
Number of pages	8
Publication status	Published - 2022
Event	SPIE Photonics Europe 2022 - Strasbourg, France Duration: 20 May 2022 → 20 May 2022 Conference number: SPIE 12137

Conference

Conference	SPIE Photonics Europe 2022
Country/Territory	France
City	Strasbourg
Period	20/05/22 → 20/05/22

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

White Light Interferometry
Dynamical Phase Shifting Interferometry
Single-Frame low-coherence Interferometry
Phase Mask
Measurement of vibrations with interferometry

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title = "Dynamic short- and large-coherence interferometry to characterize the induced vibrations and topology change of the cryogenic mirror of the Einstein Telescope prototype",

abstract = "The E-TEST project builds a prototype for the Einstein Telescope (ET). ET is a proposed gravitational-wave observatory. E-TEST includes a silicon mirror of 30 cm up to 40 cm diameter, suspended and cooled down at cryogenic temperatures from 20 K to 30 K. During the cooling down, the mirror will be affected by surface topology changes, wavefront deformation, and induced vibrations. We present a metrology device based on short-coherence interferometry to characterize the mirror surface with a sub-nanometer resolution. We design an innovative phase mask to achieve dynamic or single-frame white light interferometry. Moreover, we discuss different interferogram analysis methods. We also discuss the implementation of a long-coherence source to facilitate the measurements with the low-coherence source. ",

keywords = "White Light Interferometry, Dynamical Phase Shifting Interferometry, Single-Frame low-coherence Interferometry, Phase Mask, Measurement of vibrations with interferometry",

author = "P{\'e}rez, {Jes{\'u}s Vilaboa} and J.J.D. Loicq",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. ; SPIE Photonics Europe 2022 ; Conference date: 20-05-2022 Through 20-05-2022",

year = "2022",

language = "English",

booktitle = "SPIE 12137: Optics and Photonics for Advanced Dimensional Metrology II",

publisher = "SPIE",

address = "United States",

}

Dynamic short- and large-coherence interferometry to characterize the induced vibrations and topology change of the cryogenic mirror of the Einstein Telescope prototype. / Pérez, Jesús Vilaboa ; Loicq, J.J.D.
SPIE 12137: Optics and Photonics for Advanced Dimensional Metrology II. SPIE, 2022.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Dynamic short- and large-coherence interferometry to characterize the induced vibrations and topology change of the cryogenic mirror of the Einstein Telescope prototype

AU - Pérez, Jesús Vilaboa

AU - Loicq, J.J.D.

N1 - Conference code: SPIE 12137

PY - 2022

Y1 - 2022

N2 - The E-TEST project builds a prototype for the Einstein Telescope (ET). ET is a proposed gravitational-wave observatory. E-TEST includes a silicon mirror of 30 cm up to 40 cm diameter, suspended and cooled down at cryogenic temperatures from 20 K to 30 K. During the cooling down, the mirror will be affected by surface topology changes, wavefront deformation, and induced vibrations. We present a metrology device based on short-coherence interferometry to characterize the mirror surface with a sub-nanometer resolution. We design an innovative phase mask to achieve dynamic or single-frame white light interferometry. Moreover, we discuss different interferogram analysis methods. We also discuss the implementation of a long-coherence source to facilitate the measurements with the low-coherence source.

AB - The E-TEST project builds a prototype for the Einstein Telescope (ET). ET is a proposed gravitational-wave observatory. E-TEST includes a silicon mirror of 30 cm up to 40 cm diameter, suspended and cooled down at cryogenic temperatures from 20 K to 30 K. During the cooling down, the mirror will be affected by surface topology changes, wavefront deformation, and induced vibrations. We present a metrology device based on short-coherence interferometry to characterize the mirror surface with a sub-nanometer resolution. We design an innovative phase mask to achieve dynamic or single-frame white light interferometry. Moreover, we discuss different interferogram analysis methods. We also discuss the implementation of a long-coherence source to facilitate the measurements with the low-coherence source.

KW - White Light Interferometry

KW - Dynamical Phase Shifting Interferometry

KW - Single-Frame low-coherence Interferometry

KW - Phase Mask

KW - Measurement of vibrations with interferometry

M3 - Conference contribution

BT - SPIE 12137: Optics and Photonics for Advanced Dimensional Metrology II

PB - SPIE

T2 - SPIE Photonics Europe 2022

Y2 - 20 May 2022 through 20 May 2022

ER -

Dynamic short- and large-coherence interferometry to characterize the induced vibrations and topology change of the cryogenic mirror of the Einstein Telescope prototype

Abstract

Conference

Bibliographical note

Keywords

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