High-resolution 3-D imaging of surface damage sites in fused silica with Optical Coherence Tomography

Gabe Guss, Isaac Bass, Richard Hackel, Christian Mailhiot, Stavros G. Demos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

In this work, we present the first successful demonstration of a non-contact technique to precisely measure the 3D spatial characteristics of laser induced surface damage sites in fused silica for large aperture laser systems by employing Optical Coherence Tomography (OCT). What makes OCT particularly interesting in the characterization of optical materials for large aperture laser systems is that its axial resolution can be maintained with working distances greater than 5 cm, whether viewing through air or through the bulk of thick optics. Specifically, when mitigating surface damage sites against further growth by CO2 laser evaporation of the damage, it is important to know the depth of subsurface cracks below the damage site. These cracks are typically obscured by the damage rubble when imaged from above the surface. The results to date clearly demonstrate that OCT is a unique and valuable tool for characterizing damage sites before and after the mitigation process. We also demonstrated its utility as an in-situ diagnostic to guide and optimize our process when mitigating surface damage sites on large, high-value optics.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6720
DOIs
StatePublished - 2008
Externally publishedYes
Event39th Annual Symposium on Optical Materials for High-Power Lasers - Boulder, CO, United States
Duration: Sep 24 2007Sep 26 2007

Other

Other39th Annual Symposium on Optical Materials for High-Power Lasers
CountryUnited States
CityBoulder, CO
Period9/24/079/26/07

Fingerprint

Optical tomography
Fused silica
tomography
silicon dioxide
damage
Imaging techniques
Lasers
high resolution
Optics
Cracks
Optical materials
lasers
cracks
apertures
Evaporation
optics
Demonstrations
optical materials
Air
evaporation

Keywords

  • Fused silica
  • Optical coherence tomography
  • Surface damage

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Guss, G., Bass, I., Hackel, R., Mailhiot, C., & Demos, S. G. (2008). High-resolution 3-D imaging of surface damage sites in fused silica with Optical Coherence Tomography. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6720). [67201F] https://doi.org/10.1117/12.748452

High-resolution 3-D imaging of surface damage sites in fused silica with Optical Coherence Tomography. / Guss, Gabe; Bass, Isaac; Hackel, Richard; Mailhiot, Christian; Demos, Stavros G.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6720 2008. 67201F.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Guss, G, Bass, I, Hackel, R, Mailhiot, C & Demos, SG 2008, High-resolution 3-D imaging of surface damage sites in fused silica with Optical Coherence Tomography. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6720, 67201F, 39th Annual Symposium on Optical Materials for High-Power Lasers, Boulder, CO, United States, 9/24/07. https://doi.org/10.1117/12.748452
Guss G, Bass I, Hackel R, Mailhiot C, Demos SG. High-resolution 3-D imaging of surface damage sites in fused silica with Optical Coherence Tomography. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6720. 2008. 67201F https://doi.org/10.1117/12.748452
Guss, Gabe ; Bass, Isaac ; Hackel, Richard ; Mailhiot, Christian ; Demos, Stavros G. / High-resolution 3-D imaging of surface damage sites in fused silica with Optical Coherence Tomography. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6720 2008.
@inproceedings{369f9cb0a08b47338d41a2529ca8d2c0,
title = "High-resolution 3-D imaging of surface damage sites in fused silica with Optical Coherence Tomography",
abstract = "In this work, we present the first successful demonstration of a non-contact technique to precisely measure the 3D spatial characteristics of laser induced surface damage sites in fused silica for large aperture laser systems by employing Optical Coherence Tomography (OCT). What makes OCT particularly interesting in the characterization of optical materials for large aperture laser systems is that its axial resolution can be maintained with working distances greater than 5 cm, whether viewing through air or through the bulk of thick optics. Specifically, when mitigating surface damage sites against further growth by CO2 laser evaporation of the damage, it is important to know the depth of subsurface cracks below the damage site. These cracks are typically obscured by the damage rubble when imaged from above the surface. The results to date clearly demonstrate that OCT is a unique and valuable tool for characterizing damage sites before and after the mitigation process. We also demonstrated its utility as an in-situ diagnostic to guide and optimize our process when mitigating surface damage sites on large, high-value optics.",
keywords = "Fused silica, Optical coherence tomography, Surface damage",
author = "Gabe Guss and Isaac Bass and Richard Hackel and Christian Mailhiot and Demos, {Stavros G.}",
year = "2008",
doi = "10.1117/12.748452",
language = "English (US)",
isbn = "9780819468772",
volume = "6720",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

}

TY - GEN

T1 - High-resolution 3-D imaging of surface damage sites in fused silica with Optical Coherence Tomography

AU - Guss, Gabe

AU - Bass, Isaac

AU - Hackel, Richard

AU - Mailhiot, Christian

AU - Demos, Stavros G.

PY - 2008

Y1 - 2008

N2 - In this work, we present the first successful demonstration of a non-contact technique to precisely measure the 3D spatial characteristics of laser induced surface damage sites in fused silica for large aperture laser systems by employing Optical Coherence Tomography (OCT). What makes OCT particularly interesting in the characterization of optical materials for large aperture laser systems is that its axial resolution can be maintained with working distances greater than 5 cm, whether viewing through air or through the bulk of thick optics. Specifically, when mitigating surface damage sites against further growth by CO2 laser evaporation of the damage, it is important to know the depth of subsurface cracks below the damage site. These cracks are typically obscured by the damage rubble when imaged from above the surface. The results to date clearly demonstrate that OCT is a unique and valuable tool for characterizing damage sites before and after the mitigation process. We also demonstrated its utility as an in-situ diagnostic to guide and optimize our process when mitigating surface damage sites on large, high-value optics.

AB - In this work, we present the first successful demonstration of a non-contact technique to precisely measure the 3D spatial characteristics of laser induced surface damage sites in fused silica for large aperture laser systems by employing Optical Coherence Tomography (OCT). What makes OCT particularly interesting in the characterization of optical materials for large aperture laser systems is that its axial resolution can be maintained with working distances greater than 5 cm, whether viewing through air or through the bulk of thick optics. Specifically, when mitigating surface damage sites against further growth by CO2 laser evaporation of the damage, it is important to know the depth of subsurface cracks below the damage site. These cracks are typically obscured by the damage rubble when imaged from above the surface. The results to date clearly demonstrate that OCT is a unique and valuable tool for characterizing damage sites before and after the mitigation process. We also demonstrated its utility as an in-situ diagnostic to guide and optimize our process when mitigating surface damage sites on large, high-value optics.

KW - Fused silica

KW - Optical coherence tomography

KW - Surface damage

UR - http://www.scopus.com/inward/record.url?scp=45549103129&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=45549103129&partnerID=8YFLogxK

U2 - 10.1117/12.748452

DO - 10.1117/12.748452

M3 - Conference contribution

AN - SCOPUS:45549103129

SN - 9780819468772

VL - 6720

BT - Proceedings of SPIE - The International Society for Optical Engineering

ER -