Laser-induced contamination and its impact on laser damage threshold

Schröder, H.; Wagner, Paul; Kokkinos, Dimitrios T.; Riede, Wolfgang; Tighe, Adrian

doi:10.1117/12.2030002

Cited by 21 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Possibly the LIC effect is enhanced by the higher porosity of the EBD coating. This behavior was also observed in former experiments with AR coated optics [7].…”

Section: Parameter Valuesupporting

confidence: 86%

See 1 more Smart Citation

Laser-induced contamination of space borne laser systems: impact of organic contamination and mitigation by oxygen

et al. 2016

Self Cite

View full text Add to dashboard Cite

Laser-induced contamination (LIC) is still a major risk for space based laser systems. In this paper the mitigation of LIC by oxygen is investigated. Tests were performed with a pulsed laser at 355 nm. The partial pressure of the contamination material was in the range of 10-5-10-4 mbar. The mitigation effect showed a threshold behavior concerning the ratio between contamination and oxygen pressure. Also a cleaning effect was successfully demonstrated: previously created depositions were completely removed by irradiation at several tens Pa oxygen pressure without any remaining degradation of the optical surface.

show abstract

“…Possibly the LIC effect is enhanced by the higher porosity of the EBD coating. This behavior was also observed in former experiments with AR coated optics [7].…”

Section: Parameter Valuesupporting

confidence: 86%

“…LIC proved to be particular critical if the laser system is operated under vacuum conditions and in short wavelength regime (UV). Enhanced energy absorption on LIC deposits could drastically increase the vulnerability of the optics [7]. In former work it was shown, that deposit formation can be significantly reduced by oxygen [8].…”

Section: Introductionmentioning

confidence: 98%

Laser-induced contamination of space borne laser systems: impact of organic contamination and mitigation by oxygen

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…For higher irradiation fluence even coating ablation occurred. On the reference sides of the samples, where only an identical AR coating was deposited without any nanoparticles, at higher fluence the formation of micro-channels was observed in good agreement to previous tests 6 .…”

Section: Discussionsupporting

confidence: 89%

Enhancement of contamination growth and damage by absorption centers under UV irradiation

et al. 2014

Self Cite

View full text Add to dashboard Cite

Contamination plays a major role in lifetime of vacuum optics. Several efforts have been made to derive suitable models for lifetime prediction in laser-induced contamination related optical breakdown. But the broad spectrum of potential contaminants present in the various applications with their very specific contamination mechanisms complicates the derivation of universal optics degradation models.As one possible contamination initiation process, the impact of optical absorption on the laser-induced contamination and resulting optical breakdown is studied in this work. A set of specifically prepared samples using nanometer sized gold particles embedded in dense IBS anti-reflecting coatings is exposed to radiation of 355nm in low pressure naphthalene atmosphere. Even though the artificial defects are not in direct contact with the contaminant, their influence on the long-term optics performance in dependence on the particle concentration in the coating is evident. In the presence of naphthalene, the artificial nano-defects cause a significantly accelerated degradation compared to reference samples without those defects or in absence of the contaminant. For this specific type of contaminant, a correlation of the optical absorption and long-term durability is derived.

show abstract

“…Here, we follow a different route to address and resolve the problem of UV mirror degradation under ultrahigh vacuum conditions. The work of numerous authors [15][16][17][18] suggests that hydrocarbons or other outgassing organic compounds deposit under ultrahigh vacuum conditions on the surface of optical coatings in presence of ultraviolet radiation. The shape of deposition was found to reflect the laser mode suggesting a laser-induced cracking and deposition.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet Fabry-Perot cavity with stable finesse under ultrahigh vacuum conditions

Schmitz

Meyer

Köhl

2019

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

Laser-induced contamination and its impact on laser damage threshold

Cited by 21 publications

References 0 publications

Laser-induced contamination of space borne laser systems: impact of organic contamination and mitigation by oxygen

Laser-induced contamination of space borne laser systems: impact of organic contamination and mitigation by oxygen

Enhancement of contamination growth and damage by absorption centers under UV irradiation

Ultraviolet Fabry-Perot cavity with stable finesse under ultrahigh vacuum conditions

Contact Info

Product

Resources

About