Temperature distribution during heating using a high repetition rate pulsed laser

1991 ◽  
Vol 69 (5) ◽  
pp. 2871-2876 ◽  
Author(s):  
Belgacem Haba ◽  
Brian W. Hussey ◽  
Arunava Gupta
Keyword(s):  
Temperature Distribution ◽  
Repetition Rate ◽  
Pulsed Laser ◽  
High Repetition Rate ◽  
High Repetition

Detector Array for Measuring Temporal-Spatial Distribution of High-Repetition-Rate Pulsed Laser Beam Profile

2013 ◽  
Vol 40 (6) ◽  
pp. 0608003
Author(s):  
冯国斌 Feng Guobin ◽  
王振宝 Wang Zhenbao ◽  
冯刚 Feng Gang ◽  
杨鹏翎 Yang Pengling ◽  
王群书 Wang Qunshu ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Laser Beam ◽  
Repetition Rate ◽  
Pulsed Laser ◽  
High Repetition Rate ◽  
Beam Profile ◽  
Detector Array ◽  
Laser Beam Profile ◽  
High Repetition ◽  
Pulsed Laser Beam

scholarly journals Charge-Line Dual-FET High-Repetition-Rate Pulsed Laser Driver

2019 ◽  
Vol 9 (7) ◽  
pp. 1289 ◽  
Author(s):  
Mateusz Żbik ◽  
Piotr Wieczorek
Keyword(s):  
Laser Diode ◽  
Repetition Rate ◽  
Field Effect Transistors ◽  
High Reliability ◽  
Pulsed Laser ◽  
High Repetition Rate ◽  
High Repetition ◽  
Laser Driver ◽  
Charge Line ◽  
Digital Circuitry

Most modern pulsed laser systems require versatile laser diode drivers. A state-of-the-art pulsed laser driver should provide precise peak power regulation, high repetition rate, and pulse duration control. A new, charge line dual-FET transistor circuit structure was developed to provide all these features. The pulsed modulation current is adjustable up to Imax = 1.2 A, with the laser diode forward voltage acceptable up to UF max = 20 V. The maximum repetition rate is limited by a charge line circuit to frep max = 20 MHz. Compared to the conventional single transistor drivers, the solution proposed in this paper allows a precise, high resolution width regulation to be obtained, whereas a low pulse jitter is ensured. In the solution, two separate, out-of-phase signals are used to trigger the individual Field Effect Transistors (FET). The resultant pulsed modulation current full-width-at-half-maxima (FWHM) is regulated from ~200 ps up to 2 ns. All control and timing signals are generated with a popular Field-Programmable Gate Array (FPGA) digital circuitry. The use of standard FPGA devices ensures the low cost and high reliability of the circuit, which are not available in laser drivers consisting of sophisticated analogue adjustable delay circuits.

Effect of laser annealing using high repetition rate pulsed laser on optical properties of phosphorus-ion-implanted ZnO nanorods

2013 ◽  
Vol 114 (2) ◽  
pp. 625-629
Author(s):  
Tetsuya Shimogaki ◽  
Taihei Ofuji ◽  
Norihiro Tetsuyama ◽  
Kota Okazaki ◽  
Mitsuhiro Higashihata ◽  
...  
Keyword(s):  
Optical Properties ◽  
Repetition Rate ◽  
Laser Annealing ◽  
Zno Nanorods ◽  
Pulsed Laser ◽  
High Repetition Rate ◽  
High Repetition ◽  
Ion Implanted

Si nanostructures grown by picosecond high repetition rate pulsed laser deposition

2013 ◽  
Vol 278 ◽  
pp. 67-70 ◽  
Author(s):  
M. Pervolaraki ◽  
Ph. Komninou ◽  
J. Kioseoglou ◽  
G.I. Athanasopoulos ◽  
J. Giapintzakis
Keyword(s):  
Pulsed Laser Deposition ◽  
Repetition Rate ◽  
Pulsed Laser ◽  
High Repetition Rate ◽  
Laser Deposition ◽  
High Repetition ◽  
Si Nanostructures

scholarly journals Using A High Repetition Rate Nd: YAG Laser For Pulsed Laser Ablation Propulsion

2021 ◽  
Author(s):  
Daniel Hayek
Keyword(s):  
Laser Ablation ◽  
Repetition Rate ◽  
New Technology ◽  
Specific Impulse ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
High Repetition Rate ◽  
Test Apparatus ◽  
High Repetition ◽  
Laser Propulsion

Laser propulsion is a relatively new technology being researched for its vast potential. A test apparatus was developed to measure small forces using piezoelectric films and a developed amplifier tuned to the specific frequencies expected from the system. The system provided consistent results comparable to published values. The tests conducted in this thesis evaluated the effects of using a high repetition rate laser for laser propulsion. The results are on the micropropulsion scale, however, the findings are expected to perform similarly on a larger scale. The thrust, moment coupling coefficient, and specific impulse values were evaluated for aluminum, brass, and PVC of differing thicknesses. The results concluded that the repetition rate in fact did not have much effect on the thrust; thrust was primarily dependent on the pulse energy and the material thickness. The repetition rate was found to affect the specific impulse values; a result of the heat affected zone created by the laser ablation, thereby reducing the effective propellant used for propulsion.

Effect of Quasi-Vacuum Environment in Ablation with High Repetition Rate Pulsed Laser

2009 ◽  
Vol 36 (1) ◽  
pp. 238-243
Author(s):  
王晓东 Wang Xiaodong ◽  
汪盛烈 Wang Shenglie ◽  
刘劲松 Liu Jinsong
Keyword(s):  
Repetition Rate ◽  
Pulsed Laser ◽  
High Repetition Rate ◽  
High Repetition

Dual-Contrast Nonlinear Photoacoustic Sensing and Imaging Based on Single High-Repetition- Rate Pulsed Laser

2019 ◽  
Vol 19 (14) ◽  
pp. 5559-5565
Author(s):  
Hengrong Lan ◽  
Tingyang Duan ◽  
Daohuai Jiang ◽  
Hongtao Zhong ◽  
Meng Zhou ◽  
...  
Keyword(s):  
Repetition Rate ◽  
Pulsed Laser ◽  
High Repetition Rate ◽  
High Repetition
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