Biography
Biography: Ephraim Greenfield
Abstract
The trend in lasers used for material processing has been to higher and higher powers that today have reached as much as 100kW and above. Measuring the power and beam quality of such high powers is an increasing challenge. Ophir has developed a power meter capable of measuring up to 120kW of power and a beam profiler capable of measuring the beam profile at the focal spot at similar powers. The power meter is a relatively compact device carefully designed to spread the beam in a manner so as not to exceed the damage threshold of the materials used. The beam profiler uses Rayleigh scattering to measure the beam profile with no physical contact at all with the beam. We will describe in detail how these devices operate.