RARE EARTH DOPED DOUBLE CLAD OPTICAL FIBER WITH PLURALITY OF AIR HOLES AND STRESS RODS

摘要

An optical fiber including: (i) a silica based, rare earth doped core having a first index of refraction n1; and (ii) at least one silica based cladding surrounding the core and having a second index of refraction n2, such that nln2, said cladding having a plurality of stress rods (13, 15) and a plurality of air holes (24, 26) extending longitudinally through the length of said optical fiber; wherein said optical fiber supports a single polarization mode or poses polarization maintaining properties within the operating wavelength range.