Optical fibers doped with a wavelength shifter are often used to collect scintillation light in particle detectors.
2.
It is used as a wavelength shifter ( also called a " secondary scintillator " ), which means that it converts shorter wavelength light to longer wavelength light.
3.
It is used as a wavelength shifter ( also called a " primary shifter " or " fluor " ), which means that it converts shorter wavelength light to longer wavelength light.
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