Patent ID: 6208781
Filing Date: 2001-03-27
Classification: G02B

Abstract:
A fiber optic transmission system for high laser power transmission comprising:at least one optical fiber having a core, a cladding and a cross sectional area, and having an input end and an output end, and each end having an end surface and a cross sectional area;said at least one optical fiber consisting of an optical material which is transparent over a spectral region including wavelengths emitted by a chosen laser;wherein said optical material of said optical fiber is substantially silica;at least said input end being thermally deformed and having an expanded cross sectional area compared to said cross sectional area of said optical fiber;at least said input end further having a micro-structured end surface whose features are pre-determined for a pre-selected operating wavelength of said chosen laser;wherein said end surface of said thermally deformed input end has been polished flat perpendicular to a long axis of said optical fiber and presents an optimally sized flat surface for accepting output from a laser source;said features being characterized by a preferred depth, a peak to peak distance, and a shape; andsaid preferred depth and said peak to peak distances on said micro-structured end surface being smaller than said pre-selected operating wavelength of said chosen laser.