Investigation of operational parameters on copper bromide laser output power

2019 ◽  
Vol 9 (3) ◽  
pp. 26-29 ◽  
Author(s):  
S Mohammadpour Lima ◽  
Keyword(s):  
Output Power ◽  
Input Power ◽  
Maximum Output ◽  
Buffer Gas ◽  
Operational Parameters ◽  
Laser Efficiency ◽  
Copper Bromide ◽  
Operational Temperature ◽  
Inner Diameter ◽  
Copper Bromide Laser

In this work, a copper bromide laser with an active medium length of 58 cm and an inner diameter of 20 mm designed and constructed. He and Ne used as buffer gases. The effect of reservoir temperature, He and Ne buffer gas pressure, frequency and electrical input power on the output power investigated. The result of experiments shows that an optimum laser efficiency obtained at the electrical input power of 2.1kW and corresponding operational temperature of 510 oC. The maximum output powers, 4 and 6 W, with use of He and Ne buffer gases, were determined at pressures 11 and 24 torr, respectively.

On the swimming of a flexible body in a vortex street

2009 ◽  
Vol 635 ◽  
pp. 27-45 ◽  
Author(s):  
SILAS ALBEN
Keyword(s):  
Closed Form ◽  
Output Power ◽  
Optimization Problems ◽  
Body Wave ◽  
Maximum Output Power ◽  
Input Power ◽  
The Body ◽  
Vortex Street ◽  
Flexible Body ◽  
Maximum Output

We formulate a new theoretical model for the swimming of a flexible body in a vortex street. We consider the class of periodic travelling-wave body motions, in the limit of small amplitude. We calculate the output power provided to the body by thrust forces, and the input power done against pressure forces, as functions of the aspect ratio and strength of the vortex street. We then formulate two optimization problems. In the first, we determine the body wave which provides maximum output power for fixed amplitude. We find a closed-form solution with a transition from power law to exponential decay of output power as the vortex street widens. In the second problem, we incorporate internal viscoelasticity to the swimming body and compute its contribution to the input power. We find the body wave which maximizes efficiency for a given output power. The body shape and resulting efficiency are found in closed form and simple approximate formulas are given. We find that efficiency scales as the inverse of the damping parameter. Finally, we compare our results with previous experiments and simulations. We find agreement in some aspects and disagreement in others. We give physical interpretations for agreements and disagreements in terms of the phase between the body wave and vortex street.

MARS models of laser efficiency of copper bromide laser

2013 ◽  
Author(s):  
D. S. Voynikova ◽  
S. G. Gocheva-Ilieva ◽  
I. P. Iliev
Keyword(s):  
Laser Efficiency ◽  
Copper Bromide ◽  
Copper Bromide Laser

Copper bromide laser of 120-W average output power

1997 ◽  
Vol 33 (5) ◽  
pp. 705-709 ◽  
Author(s):  
D.N. Astadjov ◽  
K.D. Dimitrov ◽  
D.R. Jones ◽  
V.K. Kirkov ◽  
C.E. Little ◽  
...  
Keyword(s):  
Output Power ◽  
Average Output Power ◽  
Average Output ◽  
Copper Bromide ◽  
Copper Bromide Laser

scholarly journals Design and simulate a doherty power amplifier using GaAs technology for telecommunication applications

2019 ◽  
Vol 15 (2) ◽  
pp. 845
Author(s):  
Ehsan Barmala
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
Power Amplifiers ◽  
High Efficiency ◽  
Maximum Output Power ◽  
Input Power ◽  
Power Divider ◽  
Maximum Efficiency ◽  
Maximum Output ◽  
Doherty Power Amplifier

<span>In this paper, a Doherty power amplifier was designed and simulated at 2.4 GHz central frequency which has high efficiency. A Doherty power amplifier is a way to increase the efficiency in the power amplifiers. OMMIC ED02AH technology and PHEMT transistors, which is made of gallium arsenide, have been used in this simulation. The Doherty power amplifier unique feature is its simple structure which is consisting of two parallel power amplifiers and transmission lines. In order to integrate the circuit, the Doherty power transmission amplifier lines were implemented using an inductor and capacitive components. Also, the Wilkinson power divider is used on the chip input. To improve the efficiency, the auxiliary amplifier dimensions is selected enlarge and the further input power is allocated it by the power divider. A parallel R-C circuit has been used at the input of transistors to improve their stability. Simulation results show that the Doherty power amplifier has 17.2 dB output power gain, 23 dBm maximum output power, and its output power P<sub>1dB</sub> =22.6dBm at compression point -1 dB, also, its maximum efficiency is 55.5%.</span>

scholarly journals Linearization of broadband microwave amplifier

2014 ◽  
Vol 11 (1) ◽  
pp. 111-120 ◽  
Author(s):  
Aleksandra Djoric ◽  
Natasa Males-Ilic ◽  
Aleksandar Atanaskovic ◽  
Bratislav Milovanovic
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
Transmission Lines ◽  
Maximum Output Power ◽  
Input Power ◽  
Maximum Output ◽  
Frequency Range ◽  
Microwave Amplifier ◽  
Lumped Element ◽  
Input And Output

The linearization of broadband power amplifier for application in the frequency range 0.9-1.3 GHz is considered in this paper. The amplifier is designed for LDMOSFET characterized by the maximum output power 4W designing the broadband lumped element matching circuits and matching circuits in topologies that combines LC elements and transmission lines. The linearization of the amplifier is carried out by the second harmonics of the fundamental signals injected at the input and output of the amplifier transistor. The effects of linearization are considered for the case of two sinusoidal signals separated in frequency by different intervals up to 80 MHz ranging input power levels to saturation.

Characteristics of a copper bromide laser with flowing Ne-HBr buffer gas

1992 ◽  
Vol 24 (1) ◽  
pp. 73-82 ◽  
Author(s):  
E. S. Livingstone ◽  
D. R. Jones ◽  
A. Maitland ◽  
C. E. Little
Keyword(s):  
Buffer Gas ◽  
Copper Bromide ◽  
Copper Bromide Laser
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