Novel Laser Power Sensor Improves Process Control

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A dramatic technological advancement from Coherent has yielded a completely new type of fast response power detector. The high response speed is particularly advantageous in commercial applications where it enables CW laser power to be sampled faster and more frequently; with modulated sources it delivers peak power and temporal pulse shape data, from which pulse energy can be derived. This real-time feedback can be used to improve laser system throughput and quality, and to improve process precision, with minimal engineering investment. This document reviews a new laser power measurement technology specifically designed for use in laser-based processing tools, which directly addresses these needs.