Yes, and it's not clear it attenuates total transmitted power significantly on other wavelengths. Just putting in a diffuser you expect more light scattering ou

Yes, and it's not clear it attenuates total transmitted power significantly on other wavelengths. Just putting in a diffuser you expect more light scattering out of the rays going towards (what I presume is a) optical fibre, but most of that power just goes somewhere else, it is not absorbed.