Patent ID: 8452145
Filing Date: 2013-05-28
Classification: G02B

Abstract:
1. A triple-clad optical fiber comprising: a core, a first inner cladding, a second inner cladding, and an outer cladding wherein, the core comprises a radius of less than about 5 μm, a first index of refraction n the first inner cladding surrounds the core and comprises a radial thickness of at least 10 μm, a numerical aperture of at least about 0.12, and a second index of refraction n the second inner cladding surrounds the first inner cladding and comprises a radial thickness of at least 8 μm, a numerical aperture of at least about 0.20, and a second index of refraction , wherein a relative refractive index percent (Δ%) of the second cladding relative to the outer cladding is greater than 1%; the outer cladding surrounds the second inner cladding and comprises a radial thickness of at least 10 μm and a third index of refraction n