Patent ID: 11940652
Assignee: LUMENTUM OPERATIONS LLC
Field: Optics (Instruments)
Classification: CPC G  B  H | IPC B  G  H

Claim 14:
15. A method comprising:
guiding a laser output from a first end of an optical waveguide to a second end of the optical waveguide; and
modifying the laser output by a fiber telescope coupled to the second end of the optical waveguide,
wherein the fiber telescope comprises a set of graded-index optical elements comprising:
a first graded-index optical element having a first numerical aperture, and
a second graded-index optical element having a second numerical aperture that is different from the first numerical aperture,

wherein the fiber telescope comprises cladding surrounding the set of graded-index optical elements, and
wherein diameter of the fiber telescope is constant along its length; and

reducing a power density of the laser output by an endcap fused to at least one of the set of graded-index optical elements.