scholarly journals Extrema of electron density and output pulse energy in a CuCl/Ne discharge and a Cu/CuCl double‐pulsed laser

1978 ◽  
Vol 33 (8) ◽  
pp. 728-731 ◽  
Author(s):  
M. J. Kushner ◽  
F. E. C. Culick
Keyword(s):  
Electron Density ◽  
Pulse Energy ◽  
Pulsed Laser ◽  
Output Pulse ◽  
Output Pulse Energy

Parametric Study of a Helical TEA CO2 Laser

1973 ◽  
Vol 51 (16) ◽  
pp. 1705-1708 ◽  
Author(s):  
A. Girard ◽  
H. Pépin ◽  
J. G. Vallée
Keyword(s):  
Laser Pulse ◽  
Parametric Study ◽  
Pulse Shape ◽  
Peak Power ◽  
Output Pulse ◽  
Tea Co2 Laser ◽  
Gas Composition ◽  
Output Pulse Energy ◽  
Power Pulse ◽  
Energy Peak

We present results of a parametric study of a helical TEA CO2 laser. The output pulse energy, peak power, pulse shape, and beam divergence have been studied as functions of the capacitance, charging voltage, and gas composition. At 50 kV, with a capacitor of 0.01 μF for each element, we have obtained 3.5 MW output in a 100 ns laser pulse. This study will be of interest to those wishing to use such a device.

The Influence of Experimental Parameters and Specimen Geometry on the Mass Spectra of Copper During Pulsed-Laser Atom-Probe Tomography

2014 ◽  
Vol 20 (6) ◽  
pp. 1715-1726 ◽  
Author(s):  
R. Prakash Kolli ◽  
Frederick Meisenkothen
Keyword(s):  
Pulse Energy ◽  
Mass Spectra ◽  
Pulsed Laser ◽  
Atom Probe ◽  
Pulse Frequency ◽  
Resolving Power ◽  
Base Temperature ◽  
Mass Resolving Power ◽  
Half Angle ◽  
Tip Radius

AbstractWe have studied the influence of experimental factors and specimen geometry on the quality of the mass spectra in copper (Cu) during pulsed-laser atom-probe tomography. We have evaluated the effects of laser pulse energy, laser pulse frequency, specimen base temperature, specimen tip radius, and specimen tip shank half-angle on the effects of mass resolving power, (m/Δm), at full-width at half-maximum and at full-width at tenth-maximum, the tail size after the major mass-to-charge state (m/n) ratio peaks, and the mass spectra. Our results indicate that mass resolving power improves with decreasing pulse energy between 40 and 80 pJ and decreasing base temperature between 20 and 80 K. The mass resolving power also improves with increasing tip radius and shank half-angle. A pulse frequency of 250 kHz slightly improves the mass resolving power relative to 100 or 500 kHz. The tail size decreases with increasing pulse energy. The mass resolving power improves when the cooling time is reduced, which is influenced by the thermal diffusivity of Cu and the specimen base temperature.

scholarly journals Semiconductor Physics, Quantum Electronics & Optoelectronics, 23 (1), P. 71-74 (2020). DOI: https://doi.org/10.15407/spqeo23.01.071 Pyroelectric USB-joulemeters of pulsed laser radiation V.B. Samoylov, L.V. Levash, O.A. Rosnovskiy, M.Yu. Vedula, V.S. Rad'ko Institute of Physics, NAS of Ukraine, 46, prospect Nauky, 03680 Kyiv, Ukraine E-mail: [email protected] Abstract. The general arrangement, principle of operation and basic parameters of pyroelectric USB-meters of energy of pulsed laser radiation have been described. A smart head of the meter converts the signal from the pyroelectric sensor and immediately transfers it to PC using a high-speed USB 2.0 connection. The device consists of two circuit panels located in the common package. The pyroelectric sensitive element and preamplifier are mounted on the sensor panel. Output of the preamplifier is connected with input of the preliminary digital processing panel. The meter is connected with host computer that performs further processing, storage and monitoring of data. Sensor panel can be produced in two modifications, dependently on the pulse energy. Sensitive elements on the base of LiNbO3 or LiTaO3 with absorbing coatings are used for measuring the low-energy pulses, whereas the transparent sensitive elements with a small intrinsic absorption is used for measurements of high-energy radiation pulses. The pulse rate and pulse energy can vary from single pulses up to 2 kHz and from 0.1 μJ up to 0.5 J, respectively. Keywords: laser, impulse radiation, joulemeter, detector, pyroelectric. Full Text (PDF) Back to Volume 23 N1 Creative Commons License This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.

2020 ◽  
Vol 23 (1) ◽  
pp. 71-74
Author(s):  
V.B. Samoylov ◽  
◽  
L.V. Levash ◽  
O.A. Rosnovskiy ◽  
M.Yu. Vedula ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Pulse Energy ◽  
High Speed ◽  
Pulsed Laser ◽  
Digital Processing ◽  
High Energy ◽  
Pulsed Laser Radiation ◽  
Semiconductor Physics ◽  
Creative Commons ◽  
Laser Impulse

scholarly journals 500-kHz Level High Energy Double-Pass Nd:YVO4 Picosecond Amplifier with Optic–Optic Efficiency of 51%

2019 ◽  
Vol 9 (2) ◽  
pp. 219
Author(s):  
Xuesheng Liu ◽  
Huan He ◽  
Yiheng Song ◽  
Congcong Wang ◽  
Zhiyong Wang
Keyword(s):  
Pulse Energy ◽  
Beam Quality ◽  
Maximum Output Power ◽  
Picosecond Laser ◽  
Output Pulse ◽  
High Energy ◽  
Maximum Output ◽  
High Pulse Energy ◽  
Double Pass ◽  
High Pulse

We have demonstrated a high pulse energy and high optic–optic efficiency double-pass picosecond (ps) master oscillator power amplifier system of 1064 nm at a pulse repetition rate of 500 kHz. A 500 kHz, 7.68 μJ picosecond laser is used as the seed laser. Through one stage double-pass traveling-wave amplifier, a maximum output power of 16.19 W at a pump power of 31.7 W is generated with the optic–optic efficiency of 51.07%. The output pulse duration is 17.6 ps, corresponding to the pulse energy of 32.38 μJ. The beam quality factor M 2 were measured to be 1.28 and 1.17 along the x, y axis direction, respectively.

Plasma impedance and electron density in a pulsed laser channel

1996 ◽  
Vol 79 (11) ◽  
pp. 8269-8273 ◽  
Author(s):  
K. H. Tsui ◽  
G. H. Cavalcanti ◽  
A. S. Farias ◽  
M. D. S. Marinha ◽  
L. M. Soares ◽  
...  
Keyword(s):  
Electron Density ◽  
Pulsed Laser ◽  
Laser Channel ◽  
Plasma Impedance
Sign in / Sign up

Export Citation Format

Share Document