Main Question or Discussion Point
Optical traps for refractive colloidal particles (latex) of around 1 micron always employ a laser ligth tipically of 30 mW or even less. I have never seen a report of an optical trap using a non-laser light source. I wonder if is possible to build a non-laser light optical trap and if not why. I suspect the reason is coherence of laser light but it does not seem enough reason (though coherence is an elusive concept for me).