Algorithm for cumulative damage probability calculations in S-on-1 laser damage testing

Schrameyer, Stefan; Jupé, Marco; Jensen, Lars; Ristau, Detlev

doi:10.1117/12.2029997

Cited by 10 publications

(4 citation statements)

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“…For each FJP-finished surface, ~ 100 testing sites were used. The damage probabilities were calculated using the “limit cumulative method” 26 and the LIDT values correspond to a damage probability of 5% to 10%.…”

Section: Methodsmentioning

confidence: 99%

Performance characterization of freeform finished surfaces of potassium dihydrogen phosphate using fluid jet polishing with a nonaqueous slurry

Urban

Kafka

Jang

et al. 2023

Sci Rep

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Potassium dihydrogen phosphate (KDP) and its deuterated analog (DKDP) are unique nonlinear optical materials for high power laser systems. They are used widely for frequency conversion and polarization control by virtue of the ability to grow optical-quality crystals at apertures suitable for fusion-class laser systems. Existing methods for freeform figuring of KDP/DKDP optics do not produce surfaces with sufficient laser-induced–damage thresholds (LIDT’s) for operation in the ultraviolet portion of high-peak-power laser systems. In this work, we investigate fluid jet polishing (FJP) using a nonaqueous slurry as a sub-aperture finishing method for producing freeform KDP surfaces. This method was used to selectively polish surface areas to different depths on the same substrate with removals ranging from 0.16 μm to 5.13 μm. The finished surfaces demonstrated a slight increase in roughness as the removal depth increased along with a small number of fracture pits. Laser damage testing with 351 nm, 1 ns pulses demonstrated excellent surface damage thresholds, with the highest values in areas devoid of fracture pits. This work demonstrates, for the first time, a method that enables fabrication of a waveplate that provides tailored polarization randomization that can be scaled to meter-sized optics. Furthermore, this method is based on FJP technology that incorporates a nonaqueous slurry specially designed for use with KDP. This novel nonaqueous FJP process can be also used for figuring other types of materials that exhibit similar challenging inherent properties such as softness, brittleness, water-solubility, and temperature sensitivity.

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Section: Methodsmentioning

confidence: 99%

Performance characterization of freeform finished surfaces of potassium dihydrogen phosphate using fluid jet polishing with a nonaqueous slurry

Urban

Kafka

Jang

et al. 2023

Sci Rep

View full text Add to dashboard Cite

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“…The onset of laser damage was visualized by a detectable change in the localized scattering intensity in the irradiated region determined by subtraction of images recorded prior to and immediately after laser irradiation. The LIDT measurements reported in this work are expressed in terms of damage probability using the “limit cumulative” method 21 – 23 , which is designed to increase the statistical confidence when extensive testing is not possible. In the present study, we considered that damage testing could cause molecular decomposition due to ablation within the LC fluid that can result in an artificial lowering of the observed LIDT or LIFT values.…”

Section: Methodsmentioning

confidence: 99%

Multiparameter laser performance characterization of liquid crystals for polarization control devices in the nanosecond regime

Marshall

Kafka

Urban

et al. 2022

Sci Rep

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Interactions of liquid crystals (LC’s) with polarized light have been studied widely and have spawned numerous device applications, including the fabrication of optical elements for high-power and large-aperture laser systems. Currently, little is known about both the effect of incident polarization state on laser-induced–damage threshold (LIDT) and laser-induced functional threshold (LIFT) behavior at sub-LIDT fluences under multipulse irradiation conditions. This work reports on the first study of the nanosecond-pulsed LIDT’s dependence on incident polarization for several optical devices employing oriented nematic and chiral-nematic LC’s oriented by surface alignment layers. Accelerated lifetime testing was also performed to characterize the ability of these devices to maintain their functional performance under multipulse irradiation as a function of the laser fluence at both 1053 nm and 351 nm. Results show that the LIDT varies as a function of input polarization by 30–80% within the same device, while the multipulse LIFT (which can differ from the nominal LIDT) depends on irradiation conditions such as laser fluence and wavelength.

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“…It is determined for each focal length by plotting the damage probability for each pulse energy. The damage probability is calculated using a cumulative approach [5] by dividing the numbers of fibers damaged up to a specific pulse energy by the total number of fibers tested. A distinction was made between the different damage definitions and the different focal lengths of the focusing lens.…”

Section: Transmittable Pulse Energymentioning

confidence: 99%

Determination of the laser-induced damage threshold of polymer optical fibers

Kiedrowski

Thiem

Jakobs

et al. 2018

Laser-Induced Damage in Optical Materials 2018: 50th Anniversary Conference

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Investigating the properties of manufactured polymer optical fibers is essential to determine proper areas of application. Using pulsed laser radiation, especially with respect to laser activity in optical fibers, the maximum acceptable transmittable energy without inducing damage is of particular interest. Therefore, this work is related to laser-induced damage in polymer optical fibers at a wavelength of 532 nm and a pulse duration of 7.3 ns. In particular, the influence of the coupling condition on the transmittable pulse energy and the damage behavior applying an R-on-1 test procedure are analyzed in this study. The obtained results give information about the long-term behavior and will be used to optimize the manufacturing process.

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Algorithm for cumulative damage probability calculations in S-on-1 laser damage testing

Cited by 10 publications

References 0 publications

Performance characterization of freeform finished surfaces of potassium dihydrogen phosphate using fluid jet polishing with a nonaqueous slurry

Performance characterization of freeform finished surfaces of potassium dihydrogen phosphate using fluid jet polishing with a nonaqueous slurry

Multiparameter laser performance characterization of liquid crystals for polarization control devices in the nanosecond regime

Determination of the laser-induced damage threshold of polymer optical fibers

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