Patent ID: 9207402
Filing Date: 2015-12-08
Classification: A61B,C03B,G02B

Abstract:
1. An apparatus, comprising: an optical fiber including a surface non-normal to a longitudinal axis of a distal end portion of the optical fiber, wherein the surface defines a portion of an interface configured to redirect electromagnetic radiation propagated from within the optical fiber and incident on the interface in a direction offset from the longitudinal axis; an intermediate cap fused to an outer-layer portion of the optical fiber such that the surface of the optical fiber is disposed within a cavity defined by the intermediate cap, wherein the intermediate cap is a fluorine-doped silica cap, and the fluorine doped silica cap includes a concentration of fluorine greater than a concentration of fluorine of the outer-layer portion of the optical fiber; and an outer cap coupled to the intermediate cap, wherein the outer cap includes an opening aligned with the direction such that the electromagnetic radiation is transmitted through the opening.