Spatial coherence of low-cost 532nm green lasers

Abstract

We report for first time, to our best knowledge, experimental measurement of the degree of spatial coherence of a λ532 nm laser source (of a DPSS type -frequency doubled Nd:YVO4 laser) by reversal shear interferometers developed in our laboratories not so long. The degree of a full-sized non-apertured laser beam turned out to be quite high viz. up to 0.6 which is comparable with the degree of spatial coherence of λ510 nm copper lasers we had measured repeatedly for last decade.

Introducing m-learning in the classroom: a proposal for diffraction and image processing training

“…We may notice that this particular type of laser operates under multimodal configuration, as it was previously studied by us in a separate experiment [5]. Moreover, the degree of spatial coherence turns out to be high enough (for a particular exit power) so as to obtain a good contrast of the captured image [9]. We notice that much of the light is distributed as dictated by geometrical optics [10].…”