PARIS: Lasers are preferred as light sources in modern microscope imaging technique because of their ability to deliver fast a pulsed and extremely high intensity radiation to a target enabling rapid image acquisition. However traditional Lasers produce images which are blurred and this is caused due to a phenomenon called “high spatial coherence.”
Such speckles can degrade the quality of pictures in wide field microscopy, a technique commonly used to reproduce broad swath images of the whole side of the cell or something more intricate like the inner working of a cell.
The answer to this problem was laser-like light source with “low spatial coherence.” Low spatial coherence means that the electric field does not oscillate in different position like the traditional lasers.
Researchers at Texas A&M University have achieved just that when they demonstrated a newly emerging technique known as random Raman lasing emission can produce a bright, speckle-free, strobe light source with potential application in high-speed wide-field microscopy.
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