The experimental result shows that the depth of hardened zone and smoothness of surface can be controlled conveniently by varying the power output beamdiameter and scanning rate of laser light.
试验表明：通过调节激光器的输出功率、光斑直径和扫描速度可以方便地控制熔化层深度和表面平整度。
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In experiment, output modes of hundred-micron core diameter fiber laser are controled by the hole in the laser cavity, and the effects to beam quality are researched with holes of different diameters.
Intensity is a measure of power per unit area, and even a laser that emits only a few milli-watts can produce a lot of intensity in a beam that's only a millimeter in diameter.