We are currently setting up an experiment in which we need to pipe laser light from one optical table to another. One way we were thinking of doing this was by coupling into an optical fiber, running it to the second table, and then recollimating the light using a lens. However, if we then wanted to focus that light down again onto a sample, would our spot size be limited by the core diameter of the fiber we used since it would be in effect acting as an extended point source? E.g. if we use a 100 micron fiber to source the light, would our spot size for focusing onto a sample also be limited to 100 microns?
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