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AssigneeBiolitec Unternehmensbeteiligungs II AG
InventorsBolesh J. Skutnik, Wolfgang Neuberger, Andrey B. Grischenko
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A new type of all-silica optical fiber is described; a Structured Silica Clad Silica (SSCS) optical fiber, whose cladding is structured to provide mode mixing within the core; and/or to have an average effective refractive index. Its cross-section is essentially symmetrical, it can be used, among other objects, to provide flatter, more speckle-free outputs from fiber lasers, or other limited mode photonic sources. Building the new fiber structure around a rare earth doped laser core provides a better fiber laser/amplifier for cladding pumping. The structured silica cladding contains paired layers, in which a down doped silica layer is followed by a layer of pure, or lesser down-doped, or even up-dope silica, and die number of paired layers is, typically, from 5 to about 25, and, generally, within the paired layers the ratio of thickness of the higher RI layer of silicate the down-doped silica is very broad, lying between about 0.0625 to about 16, depending on the intended use of the SSCS fibers. In some versions, the main core material can be up-doped silica with pure silica or down-doped silica as the primary second component.
An optical fiber comprising a structured silica cladding with an average refractive index and a silica core with a refractive index higher than said structured silica cladding average refractive index.
A new subclass of all-silica optical fibers, which are particularly useful for speckle-free output even from low mode power sources, comprising:
An optical fiber comprising a structured silica cladding with an average refractive index and a silica core with a refractive index higher than said structured silica cladding average refractive index.
A new subclass of all-silica optical fibers, which are particularly useful for speckle-free output even from low mode power sources, comprising:
Dependencies are inferred from the claim text.