Characterizing laser conditioning of carbon contamination of optics using surface temperature and photo thermal common-path interferometry

Andrew Brown, Albert Ogloza, Jeffrey Thomas, Joseph Talghader

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

Abstract

High reflectivity distributed Bragg reflectors contaminated with carbon micro particles were tested with a high power 1070nm continuous wave laser. Thermal camera images of the samples showed a consistent reduction in surface heating for samples that had prior exposure to the same irradiance. To characterize irradiance vs. conditioning, the absorption change of samples was measured using photo thermal common-path interferometry before and after laser exposure. Absorption was reduced from 10% at 13kWcm-2 to up to 60% at 24kWcm-2 Surface microscope images showed particle change beginning at low irradiances with particles fragmenting, reducing in size, and being removed. Higher irradiances caused a permanent change in the substrate in the area of the original particle.

Original languageEnglish (US)
Title of host publicationOptical Interference Coatings, OIC 2016
PublisherOSA - The Optical Society
ISBN (Print)9781943580132
DOIs
StatePublished - 2016
Externally publishedYes
EventOptical Interference Coatings, OIC 2016 - Tucson, United States
Duration: Jun 19 2016Jun 24 2016

Publication series

NameOptics InfoBase Conference Papers

Other

OtherOptical Interference Coatings, OIC 2016
CountryUnited States
CityTucson
Period6/19/166/24/16

Fingerprint Dive into the research topics of 'Characterizing laser conditioning of carbon contamination of optics using surface temperature and photo thermal common-path interferometry'. Together they form a unique fingerprint.

  • Cite this

    Brown, A., Ogloza, A., Thomas, J., & Talghader, J. (2016). Characterizing laser conditioning of carbon contamination of optics using surface temperature and photo thermal common-path interferometry. In Optical Interference Coatings, OIC 2016 (Optics InfoBase Conference Papers). OSA - The Optical Society. https://doi.org/10.1364/oic.2016.thb.5