Patent ID: 7920767
Filing Date: 2011-04-05
Classification: G02B,H01S

Abstract:
1. An optical fiber having at least a segment that is bent, said bent segment comprising: a core region having a longitudinal axis, and a cladding region surrounding said core region, said core and cladding regions configured to support and guide the propagation of signal light in a fundamental transverse mode and at least one higher-order transverse mode, said modes propagating in said core region in essentially the direction of said axis, said cladding region comprising: an outer cladding region, an annular trench region disposed between said core region and said outer cladding region, at least one axially-extending pedestal region disposed within said trench region being configured (i) to support the propagation of at least one transverse mode of said at least one pedestal region, and (ii) to resonantly couple the at least one higher order transverse mode of said core region to the at least one transverse mode of said at least one pedestal region, wherein said resonant coupling is precompensated for effects from said bending; and wherein the refractive index n