Fiber laser processing method and fiber laser processing...

Details Fiber laser processing method and fiber laser processing... Fiber laser processing method and fiber laser processing...

2011-05-31

2011-05-31

Nguyen, Dung T (Department: 2828)

Coherent light generators

Optical fiber laser

C372S029011, C372S029015, C372S038010, C372S038020

Reexamination Certificate

active

07953126

ABSTRACT:
A fiber laser processing apparatus controls a LD drive current ILDin 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 (PA) for the laser processing from a preceding level PBafter a first time period (preceding pulse width TB) has elapsed (time point t2of FIGS.3A to3F) from the start of the rising to the preceding level (time point t1of FIGS.3A to3F), and this may effectively prevent occurrence of a high-peak pulse HP at the rising edge of the fiber laser beam FB (FIG.3F).

REFERENCES:
patent: 6489985 (2002-12-01), Brodsky et al.

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