The divergence of the laser beam emitted by this segment would have less angle of divergence because the plasma has less thickness
A. P. Pachkawade
Rajarshee Shahu Science College, Chandur Rly Dist. Amravati,
ashwinashwin1978@rediffmail.com
Abstract:-
The angle of divergence of output beam are different for Copper Vapour Laser and pulsed laser. The angle of divergence determine the photon flux when the beam is focused using focusing optics. Further the output beam is focused the diverging beam converges and get focused at the same point. In the present work, the analytical expressions are obtained for the peak power output of the CVL without mirror, the intensity of the laser radiation across the laser beam and peak power angle of divergence along the diameter of the discharge tube. The angle of divergence is determined by the absorption coefficients, initial inversion density and the dimensions of the laser plasma column in a direction perpendicular to the direction of propagation of the beam. The angle of divergence also increase with the dimensions of the plasma column in a direction perpendicular to the direction of propagation of the beam. From the calculation of peak power across the laser beam desired angle of divergence may be obtained. The half peak power angle of divergence for initial inversion density 0.2 and 0.4 are 20mrad and 30mrad respectively in Copper Vapour Laser.
Keywords:- Copper Vapour Laser, laser radiation, inversion density, dimensions of the laser plasma.
DOI link – https://doi.org/10.69758/GIMRJ/2505I5VXIIIP0063
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