Mode Quality (M) Measurement Improves Laser Performance
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چکیده
Introduction and Overview Two of the most important advantages of lasers over other light sources is their ability to propagate over long distances without spreading significantly (that is, to be highly collimated), and their capacity for being focused to small spots so as to deliver very high optical power densities. The easiest way to characterize how well a real world laser beam can be collimated or focused is through the use of the beam propagation factor (M 2 ). Unfortunately, M 2 is not readily measured using traditional laser beam diagnostic instruments such as power meters or beam profilers. This whitepaper reviews how M 2 is used to calculate actual (rather than theoretical) laser beam properties, and then presents a practical instrument that enables rapid M 2
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