Freeform collimator lens for angled facet laser devices
AssigneeAgilent Technologies, Inc.
InventorsGuthrie Partridge, Joao Mendes-Lopes
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Abstract
An apparatus having a waveguide and a freeform collimating lens. The waveguide is characterized by a waveguide axis and a planar end having a normal axis that is inclined at an end angle that is greater than 0 degrees with respect to the waveguide axis. The freeform collimating lens collimates light leaving the planar end of the waveguide into a collimated light beam characterized by a beam direction that is parallel to the waveguide axis. The apparatus inhibits reflections from the planar end of the waveguide from propagating back down the waveguide while providing a collimated light beam having a direction parallel to the axis of the waveguide.
Claims11
An apparatus comprising:
- a waveguide characterized by a waveguide axis and a planar end having a normal axis that is inclined at an end angle that is greater than 0 degrees with respect to said waveguide axis;
- and
- a freeform collimating lens that collimates light leaving said planar end of said waveguide into a collimated light beam characterized by a beam direction that is parallel to said waveguide axis,
- wherein said freeform collimating lens comprises a freeform concave surface proximate to said planar end, said freeform concave surface having a shape that is computed to collimate said light leaving said planar end having said normal axis that is inclined at said angle that is greater than 0 degrees with respect to said waveguide axis.
Dependencies are inferred from the claim text.