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

Claim 7:
8. 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 a diameter of the fiber telescope matches a diameter of the optical waveguide at the second end of the optical waveguide, and
wherein the modifying includes at least one of:
decreasing a spot size of the laser output,
increasing the spot size,
increasing a numerical aperture at an exit facet of the fiber telescope,
decreasing the numerical aperture,
shifting of an image plane relative to a caustic waist of the laser output, or
causing divergence of the laser output.