Forming of single-pulse regime of ruby laser oscillation with electro-optical negative feedback

2001 ◽  
Author(s):  
Boris V. Anikeev ◽  
S. A. Kutzenko ◽  
V. A. Yasynok
Keyword(s):  
Negative Feedback ◽  
Ruby Laser ◽  
Single Pulse ◽  
Laser Oscillation ◽  
Pulse Regime

scholarly journals Titanium surface modification using femtosecond laser with 1013–1015 W/cm2 intensity in vacuum

2012 ◽  
Vol 31 (1) ◽  
pp. 29-36 ◽  
Author(s):  
M. Trtica ◽  
D. Batani ◽  
R. Redaelli ◽  
J. Limpouch ◽  
V. Kmetik ◽  
...  
Keyword(s):  
Surface Modification ◽  
Femtosecond Laser ◽  
Titanium Surface ◽  
Femtosecond Lasers ◽  
Single Pulse ◽  
Surface Structures ◽  
Pulse Regime ◽  
Periodic Surface ◽  
Reduced Intensity ◽  
Surface Changes

AbstractThe response of titanium surface irradiated with high intensity (1013 – 1015 W/cm2) Ti:sapphire laser was studied in vacuum. Most of the reported investigations were conducted with nano- to femtosecond lasers in gas atmospheres while the studies of titanium surface interacting with femtosecond laser in vacuum are scarce. The laser employed in our experiment was operating at 800 nm wavelength and pulse duration of 60 fs in single pulse regime. The observed surface changes and phenomena are (1) creation of craters, (2) formation of periodic surface structures at the reduced intensity, and (3) occurrence of plasma in front the target. Since microstructuring of titanium is very interesting in many areas (industry, medicine), it can be concluded from this study that the reported laser intensities can effectively be applied for micromachining of the titanium surface (increasing the roughness, formation of parallel periodic surface structures etc.).

A single-pulse ruby laser with a phototropic ruby Q-switch

1970 ◽  
Vol 12 (4) ◽  
pp. 572-573
Author(s):  
B. B. Boiko ◽  
N. S. Petrov ◽  
V. V. Valyavko ◽  
V. A. Krivosheev ◽  
V. E. Leparskii
Keyword(s):  
Ruby Laser ◽  
Single Pulse

A narrow-line single-pulse ring-cavity ruby laser

1975 ◽  
Vol 23 (4) ◽  
pp. 1322-1326
Author(s):  
L. A. Lavrovskii ◽  
Yu. F. Morgun ◽  
M. A. Muravitskii
Keyword(s):  
Ruby Laser ◽  
Ring Cavity ◽  
Single Pulse ◽  
Narrow Line

Estimation of Ruby Laser Oscillation Loss

Nature ◽  
1963 ◽  
Vol 199 (4892) ◽  
pp. 442-443 ◽  
Author(s):  
JOSEPH I. MASTERS
Keyword(s):  
Ruby Laser ◽  
Laser Oscillation

Single-pulse repetitive mode with the ?impul's-3? ruby laser

1975 ◽  
Vol 23 (4) ◽  
pp. 1413-1415
Author(s):  
V. A. Andreichev ◽  
B. B. Boiko ◽  
L. S. Korochkin ◽  
S. A. Mikhnov
Keyword(s):  
Ruby Laser ◽  
Single Pulse

Stabilization of ruby laser radiation by an external negative feedback

1975 ◽  
Vol 5 (4) ◽  
pp. 394-396 ◽  
Author(s):  
G V Krivoshchekov ◽  
V K Makukha ◽  
V M Tarasov
Keyword(s):  
Laser Radiation ◽  
Negative Feedback ◽  
Ruby Laser

All-normal-dispersion fiber laser with NALM: power scalability of the single-pulse regime

2018 ◽  
Vol 15 (3) ◽  
pp. 035106 ◽  
Author(s):  
Gan Gao ◽  
Haitao Zhang ◽  
Yuhe Li ◽  
Decai Deng
Keyword(s):  
Fiber Laser ◽  
Single Pulse ◽  
Pulse Regime ◽  
Normal Dispersion

scholarly journals Measurement of ultrashort laser ablation of four metals (Al, Cu, Ni, W) in the single-pulse regime

2020 ◽  
Vol 9 (3) ◽  
pp. 131-143
Author(s):  
Thibault Genieys ◽  
Marc Sentis ◽  
Olivier Utéza
Keyword(s):  
Pulse Duration ◽  
Ablation Threshold ◽  
Short Pulse ◽  
Scaling Law ◽  
Single Pulse ◽  
Laser Pulses ◽  
Ablation Rate ◽  
Single Shot ◽  
Pulse Regime ◽  
Short Pulse Duration

AbstractWe provide measurements of the ablation of four post-transition and transition metals [aluminum (Al), copper (Cu), nickel (Ni) and tungsten (W)] irradiated by single 800 nm laser pulses, in ultrashort regime from 100 femtosecond (fs) pulse duration down to 15 fs covering a temporal range little explored as yet. For each metal and pulse duration tested, we measured its ablation characteristics (depth and diameter) as a function of incident energy allowing us to determine its laser-induced ablation threshold and ablation rate in a single-shot regime. For all the metals studied, we observed a constant ablation threshold fluence as a function of pulse duration extending this scaling law to pulse duration of few-optical-cycles. We provide evidence of the interest of adjusting the incident fluence to maximize the energy specific ablation depth but also of the absence of any peculiar advantage related to the use of extremely short-pulse duration for ablation purposes. Those informative and detailed ablation data have been obtained in the single-pulse regime and in air ambiance. They can serve as rewarding feedback for further establishing smart strategy for femtosecond laser micromachining and laser damage handling of metallic and metal-based components as well as for enhancing accuracy of modeling of fs laser interaction with metals in ultrashort regime.

scholarly journals Optimal Photon Energy Transfer on Titanium Targets for Laser Thrusters

2021 ◽  
Author(s):  
Aurelian Marcu ◽  
Mihai Stafe ◽  
Barbuta Mihail-Gabriel ◽  
Ungureanu Razvan ◽  
Mihai Serbanescu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Kinetic Energy ◽  
Power Density ◽  
Pulse Duration ◽  
Pulse Energy ◽  
Single Pulse ◽  
Optimal Number ◽  
Single Shot ◽  
Pulse Regime ◽  
Kinetic Energy Transfer

Abstract Using two infrared pulsed lasers systems: a picosecond solid-state Nd:YAG laser with tunable repetition rate (400 kHz - 1MHz) working in a burst mode of multi-pulse train and a femtosecond Ti:Sapphire laser amplifier with tunable pulse duration inthe range of tens of femtoseconds up to tens of picoseconds, working in single-shot mode (TEWALASS facility from CETAL-NILPRP), we have investigated the optimal laser parameters for kinetic energy transfer to a titanium target for laser-thrustapplications. In the single-pulse regime, we controlled the power density by changing both duration and pulse energy. Inthe multi-pulse regime, the train’s number of pulses (burst length), and the pulse energy variation were investigated. Heatpropagation and photon reflection-based models were used to simulate obtained experimental results. In the single-pulseregime, optimal kinetic energy transfer was obtained for power densities of about 500 times the ablation threshold correspondingto the specific laser pulse duration. In multi-pulse regimes, the optimal number of pulses per train increases with the trainfrequency and decreases with the pulse power density. An ideal energy transfer efficiency resulting from our experiments andsimulations is close to around 0.02%.

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