Towards quantification of laser-induced damage phenomena: experimental assessment of absorbed pulse energy via time-resolved digital holography

2018 ◽  
Author(s):  
Balys Momgaudis ◽  
Robertas Grigutis ◽  
Viaceslav Kudriašov ◽  
Mikas Vengris ◽  
Andrius Melninkaitis
Keyword(s):  
Pulse Energy ◽  
Digital Holography ◽  
Experimental Assessment ◽  
Time Resolved ◽  
Laser Induced Damage

Time-resolved digital holography: a versatile tool for femtosecond laser-induced damage studies

2009 ◽  
Author(s):  
Andrius Melninkaitis ◽  
Tadas Balciunas ◽  
Andrius Vanagas ◽  
Valdas Sirutkaitis
Keyword(s):  
Femtosecond Laser ◽  
Digital Holography ◽  
Time Resolved ◽  
Versatile Tool ◽  
Laser Induced Damage

scholarly journals Quantitative assessment of nonlinearly absorbed energy in fused silica via time-resolved digital holography

2019 ◽  
Vol 27 (5) ◽  
pp. 7699 ◽  
Author(s):  
Balys Momgaudis ◽  
Viaceslav Kudriasov ◽  
Mikas Vengris ◽  
Andrius Melninkaitis
Keyword(s):  
Quantitative Assessment ◽  
Digital Holography ◽  
Fused Silica ◽  
Absorbed Energy ◽  
Time Resolved

Dynamics of Ultrafast Laser Induced Damage in Single Crystal Ni-based Superalloy During Machining

2006 ◽  
Vol 980 ◽  
Author(s):  
Joel P. McDonald ◽  
Shuwei Ma ◽  
John A. Nees ◽  
Tresa M. Pollock ◽  
Steven M. Yalisove
Keyword(s):  
Shock Wave ◽  
Laser Fluence ◽  
Ultrafast Laser ◽  
Laser Exposure ◽  
Mechanical Shock ◽  
Incident Laser ◽  
Machining Time ◽  
Time Resolved ◽  
Pump Probe ◽  
Laser Induced Damage

AbstractPump-probe imaging of femtosecond pulsed laser ablation was performed to investigate the mechanical shock induced on an intermetallic superalloy CMSX-4 during femtosecond laser machining. Time resolved shadowgraphic images were collected of the shock wave produced in the air above the target following laser exposure (0-10.3 nanoseconds). The dimensions of the shock wave were measured as a function of delay time and laser fluence (1.27 J/cm2 - 62.8 J/cm2). Time-resolved shadowgraphic images of the ablation event will be presented, and the corresponding damage morphology as a function of incident laser fluence will be discussed.

scholarly journals Transient Dynamics Measurement of Light-material Interaction for Laser Optics

2019 ◽  
Vol 215 ◽  
pp. 03005
Author(s):  
Zhichao Liu ◽  
Feng Geng ◽  
Yaguo Li ◽  
Qinghua Zhang ◽  
Jian Wang ◽  
...  
Keyword(s):  
Physical Mechanism ◽  
Early Stage ◽  
Laser Damage ◽  
Time Duration ◽  
Optical Elements ◽  
Time Resolved ◽  
Nanosecond Pulsed Laser ◽  
Laser Induced Damage ◽  
Light Material ◽  
Physical Quantities

Laser damage performance is an important parameter to evaluate the quality of high power laser optical components. Understanding the physical mechanism of the interaction between laser and optical material is of great significance for improving the laser damage resistance of optical elements. For nanosecond pulsed laser, the time duration of laser-induced damage is ultra-short, and the measurement of related physical quantities is very difficult. Therefore, the Time Resolved Pump and Probe (TRPP) technique can effectively solve this problem. TRPP shadow imaging can obtain the transient dynamic information in range of picosecond to microsecond, including the plasma formation in the early stage, the shock wave propagation, the crack expanding, material ejection and other phenomena. Moreover, the ultra-fast physical quantities can be accurately measured by employing two detective beams with perpendicular polarization directions, for example S and P polarization light. All those information provides effective experimental data to reveal the physical mechanism of damage process.

Optical fatigue investigation with in situ time resolved digital holography

2019 ◽  
Author(s):  
Balys Momgaudis ◽  
Linas Smalakys ◽  
Mikas Vengris ◽  
Andrius Melninkaitis
Keyword(s):  
Digital Holography ◽  
Time Resolved

Femtosecond Time-Resolved Off-Axis Digital Holography

2009 ◽  
Author(s):  
T. Balciunas ◽  
A. Melninkaitis ◽  
A. Vanagas ◽  
V. Sirutkaitis
Keyword(s):  
Digital Holography ◽  
Time Resolved

scholarly journals Time-resolved imaging of settling mineral dust aerosols with digital holography

OSA Continuum ◽  
2020 ◽  
Vol 3 (9) ◽  
pp. 2493
Author(s):  
Florian Gaudfrin ◽  
Eduardo Santos ◽  
DeAnn Presley ◽  
Matthew J. Berg
Keyword(s):  
Digital Holography ◽  
Mineral Dust ◽  
Time Resolved ◽  
Dust Aerosols ◽  
Time Resolved Imaging ◽  
Mineral Dust Aerosols

scholarly journals A Compact Accelerator-Based Light Source for High-Power, Full-Bandwidth Tunable Coherent THz Generation

2021 ◽  
Vol 11 (24) ◽  
pp. 11850
Author(s):  
Kaiqing Zhang ◽  
Yin Kang ◽  
Tao Liu ◽  
Zhen Wang ◽  
Chao Feng ◽  
...  
Keyword(s):  
Light Source ◽  
High Power ◽  
Pulse Energy ◽  
Three Dimensional ◽  
Thz Radiation ◽  
Time Resolved ◽  
Narrow Bandwidth ◽  
Radiation Sources ◽  
High Pulse ◽  
Tunable Frequency

Terahertz (THz) radiation sources are increasingly significant for many scientific frontiers, while the generation of THz radiation with high-power at wide-tunable frequencies is still a limitation for most existing methods. In this paper, a compact accelerator-based light source is proposed to produce coherent THz radiation with high pulse energy and tunable frequency from 0.1 THz to 60 THz. By using a frequency beating laser-modulated electron beam and undulator taper, intense coherent THz radiation can be generated through undulators. Theoretical analysis and numerical simulations demonstrate that the proposed technique can generate narrow-bandwidth THz radiation with a pulse energy up to 6.3 millijoule (mJ) and the three-dimensional effects of beam has limited influence on its performance. The proposed technique will open up new opportunities for THz spectroscopic and time-resolved experiments.

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