The impact of laser damage on the lifetime of optical components in fusion lasers

Bercegol, Herve; Bouchut, Philippe; Lamaignère, Laurent; Garrec, B. Le; Raze, Gerard

doi:10.1117/12.524843

Cited by 65 publications

(32 citation statements)

References 13 publications

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“…High-precision optical components are widely used in high-energy laser equipment, such as National Ignition Facility (NIF) and the Laser Méga Joule (LMJ), which requires a high surface quality and high laser resistance [1][2][3]. In modern science, the optics, as an important branch of the physics, has close links to other sciences and technologies, which makes the optical system and the optical components play an important role in the field of research and application.…”

Section: Introductionmentioning

confidence: 99%

The influence of grinding process parameters on transmittance and absorbance of the optical components

Wang

Chen

et al. 2015

2015 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3m-Nano)

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The surface roughness and the subsurface damage introduced by manufacturing procedures are important factors affecting the mechanical and optical properties of the optical components. To obtain the relationships between the subsurface damage parameters and optical properties, we study on the influence of grinding process parameters (average abrasive size, grinding force, wheel speed, grinding depth) on the optical properties of high-precision optical components, such as transmittance and absorbance. Results indicate that with the increase of average abrasive size, grinding force or grinding depth, the transmittance of high-precision optical components decreases and the absorbance increases. However, as the wheel speed increases, the transmittance of high-precision optical components increases and the absorbance of high-precision optical components decreases. This work provides a foundation for revealing how the subsurface damage influences on the optical properties and is also useful to probe into the mechanism of damage induced by laser for the high-precision optical components.

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Section: Introductionmentioning

confidence: 99%

The influence of grinding process parameters on transmittance and absorbance of the optical components

Wang

Chen

et al. 2015

2015 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3m-Nano)

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“…Rather, the strength of brittle materials is limited by the presence of subsurface damage (SSD) [1]. It is also found that SSD can serve as reservoirs for laser light absorbing precursors [2].Thus, managing and removing SSD is essential to the technological application of optical glasses.…”

Section: Introductionmentioning

confidence: 99%

Investigation on HF based etching of the polished K9 glasses and its application in the subsurface damage

Wang¹,

Zhang²,

Xiao³

et al. 2013

2013 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale

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To characterize the subsurface mechanical damage (SSD) of the polished optics, the material remove rate of the polished K9 glasses based on HF acid etching was investigated. The etching of optics is assumed to be isotropic, a polished K9 sample with special designed pattern was tested to find out the constancy of etching rate versus time. As the etching rate was determined, the polished samples were progressively etched till the SSD disappeared visually. During etching, topographies of the surface revealed the evolution of the subsurface damages, and by recording and comparing topographies, we may get the distribution of the SSD at every depth. The thickness of etched material refers to the depth of SSD as the subsurface damages were totally exposed. Compared with the Magnetorheological finishing tamper polishing, this method of measuring SSD is low-cost and simple.

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“…The amplitude and phase modulations caused by damage defects and contamination particles can result in downstream intensification, which can damage certain optical components in the systems [1][2][3][4][5]. As one of the crucial factors restricting the output power of high-power laser systems, the research of defects in optical components has aroused great interest for a long time.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Local Modulation Beam Propagating through Spatial Filter System

You

Zhang

Zhu

2018

Advances in Condensed Matter Physics

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As local defects may significantly harm beam quality and affect safe operation, a systematic analysis of the ability of a spatial filter to alleviate these adverse effects is required. Thus, the evolutional characteristics of a beam modulated by a local defect propagating through a spatial filter system at an image reply plane and a downstream plane are analyzed in detail. Modulation stripes appear at the image reply plane; these are caused by the pinhole cutoff effect. The modulation degree increases with increasing defect size. The maximum intensification factor can reach 3.2 under certain conditions. Thus, the defect size should be restricted to a reasonable size for safe operation with a specified pinhole size. Moreover, a maximal value appears at the downstream plane, and the intensity enhances with increasing defect size. To ensure beam quality, the maximum allowable defect size and angle of the spatial filter should meet special constraints. The maximum allowable defect size is calculated based on practical configuration parameters.

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The impact of laser damage on the lifetime of optical components in fusion lasers

Cited by 65 publications

References 13 publications

The influence of grinding process parameters on transmittance and absorbance of the optical components

The influence of grinding process parameters on transmittance and absorbance of the optical components

Investigation on HF based etching of the polished K9 glasses and its application in the subsurface damage

Characteristics of Local Modulation Beam Propagating through Spatial Filter System

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