AOM modulation techniques for facilitating pulse-to-pulse...

Optical: systems and elements – Optical modulator – Light wave temporal modulation

Reexamination Certificate

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C219S121610, C219S121600, C219S121620, C359S305000, C359S307000

Reexamination Certificate

active

07027199

ABSTRACT:
Digital control of frequency and/or amplitude modulation techniques of an intracavity and/or extracavity AOM (60) facilitate substantially full extinction of a laser beam (90) to prevent unwanted laser energy from impinging a workpiece (80); facilitate laser pulse amplitude stability through closed-loop control of pulse-to-pulse laser energy; facilitate beam-positioning control including, but not limited to, closed-loop control for applications such as alignment error correction, beam walk rectification, or tertiary positioning; and facilitate employment of more than one transducer on an AOM (60) to perform any of the above-listed applications.

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