Patent ID: 7242835

Claim:
A fiber termination apparatus including an optical fiber having a fiber core operable to transmit an optical signal through said fiber core, and a structured region around said fiber core, the structured region including multiple channels of smaller internal diameter than said fiber core and a solid region surrounding said structured region, said fiber termination apparatus comprising: a blocking structure disposed over an end of said optical fiber said blocking structure including an opening substantially aligned with said fiber core, said blocking structure disposed to block the optical signal from impinging on said structured region of said optical fiber; and a ferrule, with an opening therein for locating said fiber, at the end of said fiber and enveloping an extremity of said fiber which cooperates with said blocking structure to block the optical signal from impinging on said structured region of said optical fiber, wherein said ferrule includes a circumferential recess on inside outer edge of said ferrule with said blocking structure disposed in said recess.