SIDE PUMPING TECHNIQUE MODEL FOR LASER-PUMPED BY SOLAR-ENERGY

A model of side pumping technique for a system of solar concentrators was performed for laser generation. Measurements for the total solar r adiation in the hot desert area near Helwan which is south of Cairo by 30 km, of latitude 30 degrees N and longitude 31 degrees E were carri ed out. The instruments were installed on the rooftop of the National Research Institute of Astronomy and Geophysics (NRIAG). The measuremen ts indicate that the annual average of the global solar radiation is 5 .21 kWh/m(2)/day, direct solar radiation is 6.26 kWh/m(2)/day, diffuse solar radiation is 1.86 kWh/m(2)/day, the clearness index K-t is 0.61 , and the diffuse fraction K-D is 0.37. The performance of the laser r od and the performance of the system as a whole were tested. Finally, the measurements of solar radiation were applied to the model to obtai n the behaviour of the laser output in different seasons, assuming tha t the concentrator system tracks the sun.