Slow components of wave of reflection and conduction (WRC) in plexiglass irradiated by single pulse of CO2 laser for damage threshold study

1998 ◽  
Author(s):  
Eugene M. Kudriavtsev ◽  
Sergey D. Zotov ◽  
Michel L. Autric
Keyword(s):  
Co2 Laser ◽  
Damage Threshold ◽  
Single Pulse

OPTICAL LIMITING WITH CARBON SUSPENSIONS AT SELECTED WAVELENGTHS AND PULSE LENGTHS

2000 ◽  
Vol 09 (03) ◽  
pp. 243-259 ◽  
Author(s):  
DENIS VINCENT
Keyword(s):  
High Performance ◽  
Damage Threshold ◽  
Single Pulse ◽  
Retinal Damage ◽  
Carbon Particles ◽  
Threshold Data ◽  
Wide Range ◽  
Liquid Suspensions ◽  
Pulse Characteristics ◽  
Fine Carbon

High-performance liquid suspensions of fine carbon particles have been developed at DREV over the last 10 years to fulfil requirements regarding eye protection against laser radiation over a wide range of wavelengths and pulse lengths. This paper reports on the single-pulse characteristics of DREV's best limiting suspension named CBS-100 at wavelengths of 532, 751 and 1064 nm, and at pulse lengths of 0.01, 0.1, 1 and 100 μs. Some results at higher repetition rate (6 pps) and a comparison with recent retinal damage threshold data are included also.

scholarly journals Ablation of BaWO4 Crystal by Ultrashort Laser Pulses

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 754
Author(s):  
Igor Kinyaevskiy ◽  
Pavel Danilov ◽  
Nikita Smirnov ◽  
Sergey Kudryashov ◽  
Andrey Koribut ◽  
...  
Keyword(s):  
Crystal Surface ◽  
Damage Threshold ◽  
Single Pulse ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Pulse Irradiation ◽  
Optical Damage ◽  
Order Of Magnitude ◽  
Ultrashort Laser ◽  
Optical Damage Threshold

Ablation of BaWO4 Raman crystals with different impurity concentrations by ultrashort laser pulses was experimentally studied. Laser pulses with duration varying from 0.3 ps to 1.6 ps at wavelengths of 515 nm and 1030 nm were applied. A single-pulse optical damage threshold of the crystal surface changed from 1.3 J/cm2 to 4.2 J/cm2 depending on the laser pulse parameters and BaWO4 crystal purity. The optical damage threshold under multi-pulse irradiation was an order of magnitude less.

scholarly journals Study the plasmonic property of gold nanorods highly above damage threshold via single-pulse spectral hole-burning experiments

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zibo Wang ◽  
Zhe Kan ◽  
Mengyan Shen
Keyword(s):  
Femtosecond Laser ◽  
Gold Nanorods ◽  
Damage Threshold ◽  
Single Pulse ◽  
Damping Coefficient ◽  
Femtosecond Laser Irradiation ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Plasmonic Enhancement ◽  
Laser Fluences

AbstractIntense femtosecond laser irradiation reshapes gold nanorods, resulting in a persistent hole in the optical absorption spectrum of the nanorods at the wavelength of the laser. Single-pulse hole-burning experiments were performed in a mixture of nanorods with a broad absorption around 800 nm with a 35-fs laser with 800 nm wavelength and 6 mJ/pulse. A significant increase in hole burning width at an average fluence of 106 J/m2 has been found, suggesting a tripled damping coefficient of plasmon. This shows that the surface plasmonic effect still occurs at extremely high femtosecond laser fluences just before the nanorods are damaged and the remaining 10% plasmonic enhancement of light is at the fluence of 106 J/m2, which is several orders of magnitude higher than the damage threshold of the gold nanorods. Plasmon–photon interactions may also cause an increase in the damping coefficient.

Analysis of damage threshold on HgCdTe crystal irradiated by multi-pulsed CO2 laser

2014 ◽  
Vol 58 ◽  
pp. 172-176 ◽  
Author(s):  
Wei Tang ◽  
Jin Guo ◽  
Junfeng Shao ◽  
Tingfeng Wang
Keyword(s):  
Co2 Laser ◽  
Damage Threshold ◽  
Pulsed Co2 Laser

Damage threshold of HgCdTe induced by continuous-wave CO2 laser

1999 ◽  
Vol 74 (8) ◽  
pp. 1081-1083 ◽  
Author(s):  
Jianhua Zhao ◽  
Xiangyang Li ◽  
Hua Liu ◽  
Runqing Jiang ◽  
Zhaopeng Liu ◽  
...  
Keyword(s):  
Co2 Laser ◽  
Continuous Wave ◽  
Damage Threshold

scholarly journals Short (~ ns) single pulse FIR (70-500 µm) multi-kW Raman conversion, of a short pulse (~ 25ns) broadband CO2 Laser

1994 ◽  
Vol 04 (C4) ◽  
pp. C4-747-C4-749
Author(s):  
S. MARCHETTI ◽  
S. BARTALINI ◽  
R. SIMILI ◽  
M. MARTINELLI
Keyword(s):  
Co2 Laser ◽  
Short Pulse ◽  
Single Pulse ◽  
Raman Conversion

CO2 Laser Drilling of Microvias Using Diffractive Optics Techniques: I — Mathematical Modeling

2005 ◽  
Author(s):  
Chong Zhang ◽  
Sachin Bet ◽  
Islam A. Salama ◽  
Nathaniel R. Quick ◽  
Aravinda Kar
Keyword(s):  
Mathematical Modeling ◽  
Laser Beam ◽  
Co2 Laser ◽  
Thermal Energy ◽  
Laser System ◽  
Damage Threshold ◽  
Laser Drilling ◽  
Diffractive Optics ◽  
Prototype System ◽  
Drilling Process

This paper is the first of three parts summarizing the research to use diffractive optics at the CO2 laser wavelength to drill microvias in the 40–50 μm range for organic packaging applications. This first part mainly focuses on mathematical modeling of the drilling process, which is used to define the characteristics of the laser beam necessary to achieve the required geometry of the microvias. These laser characteristics and the properties of the incoming laser beam of the CO2 laser system are then used to provide a deterministic approach for obtaining performance data for the diffractive optics design. The targeted optics are designed based on the modeling result and are then integrated into a prototype system to execute the drilling operation. The model is based on the conversion of optical energy into thermal energy due to laser-substrate interaction, propagation of thermal energy in the substrate, thermal as well as radiation damage threshold of the substrate and other important laser drilling parameters (e.g., fluence, temporal and spatial characteristics of the beam, residue at the via bottom).

Selection of a Single Pulse from a Mode-Locked TEA CO2 Laser

1972 ◽  
Vol 50 (16) ◽  
pp. 1876-1880 ◽  
Author(s):  
F. Rheault ◽  
J. L. Lachambre ◽  
J. Gilbert ◽  
R. Fortin ◽  
M. Blanchard
Keyword(s):  
Co2 Laser ◽  
Peak Power ◽  
Single Pulse ◽  
Laser Resonator ◽  
Tea Co2 Laser ◽  
Limited Precision ◽  
Acoustic Loss ◽  
Selection Of

The isolation of a single pulse from a transversely excited atmospheric (TEA) CO2 laser, actively mode-locked by an acoustic loss modulator, is described. The single pulse selection has been achieved with the aid of a GaAs electrooptic shutter located either inside or outside the laser resonator. Pulses of 1 MW peak power and 2 ns duration have been recorded with instrument-limited precision. The availability of such pulses uncovers new possibilities for the investigation of laser–matter interactions at 10.6 μm.

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