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We demonstrate a multicore multidopant fiber which, when pumped with a single pump source around ~800 nm, emits a more than one octave-spanning fluorescence spectrum ranging from 925 to 2300 nm. The fiber preform is manufactured from granulated oxides and the individual cores are doped with five different rare earths, i.e., [Nd.sup.3+], [Yb.sup.3+], [Er.sup.3+], [Ho.sup.3+], and [Tm.sup.3+]. OCIS codes: 060.2280, 060.2290, 060.2400, 160.5690, 300.2530, 300.6340.

Optical coatings with enhanced roughness offer promising prospects for ultrahydrophobic transparent surfaces with controlled scatter losses. Our approach links roughness characteristics with both wetting behavior and scattering. Experiments with rough oxide layers yielded surfaces with a high water contact angle. OCIS codes: 240.5770, 310.1620, 310.6860, 310.6870.