beam intensity
7.By using the optimum I-beam series and their profiles instead of the GB 706-65 standard, the steel c(?) n be saved by 11.00% according to the I-beam consumption intensity of 1983 and 1984. The paper also explains the teohnical feasibility, economic rationality and other advantages of the optimized I-beam series.
9.Calculation shows that, laser amplification always deteriorates the input beam quality, especially when the ratio of the amplifier bore diameter a to the spot size ω of the Gaussian beam ranges about 1～ 4. To get an amplified laser beam with better beam quality, low input intensity, low total gain and large saturation intensity of theamplifier is prefered.
