Self-cleaning optical fibre (IMAGE)
Caption
Utilizing two glasses with a different refractive index and stacked with a specific arrangement has allowed researchers to develop for the first time a multimodal fiber with a parabolic refractive index with transmission up to the mid-infrared and high nonlinearity. The spectrum of short pulses of light injected into the fiber massively broadens to span from the visible to mid-infrared. Significantly, unlike in conventional multimode fibers, the light beam remains smooth as the result of self-cleaning dynamics induced by the parabolic refractive index. Such a light source with ultrabroad spectrum, smooth beam and high power finds applications in e.g. environmental sensing or high-resolution imaging for medical diagnostics.
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Tampere University
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