| 摘要 |
<p>A fiber laser processing apparatus controls a LD drive current I LD in a power feedback control mode (Fig. 3E) such that output of a fiber laser beam FB rises substantially from zero or a value around zero to a preceding level having no substantial effect on laser processing and arrives at a desired level (P A ) for the laser processing from a preceding level P B after a first time period (preceding pulse width T B ) has elapsed (time point t 2 of Figs. 3A to 3F) from the start of the rising to the preceding level (time point t 1 of Figs. 3A to 3F), and this may effectively prevent occurrence of a high-peak pulse HP at the rising edge of the fiber laser beam FB (Fig. 3F).</p> |
