US 2026/0104548 A1Published application

Power splitters

OwnerJohn David Downie, Yongmin Jung +1inventors

InventorsJohn David Downie, Yongmin Jung, Sijing Liang

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Abstract

A power splitter may include a single-core optical fiber, a beam-splitting optical fiber, and a multicore optical fiber. The beam-splitting optical fiber may include a polygonal core configured to output a multimode interference beam pattern including a plurality of beam spots, an input end coupled to the single-core optical fiber, and an output end coupled to the multicore optical fiber. In embodiments, a difference between a mode field diameter of the cores of the multicore optical fiber and a mode field diameter of the core of the single-core optical fiber may be less than or equal to 50%. In embodiments, when the power splitter is in operation, a difference between a distance between neighboring beam spots of the multimode interference beam pattern output by the beam-splitting optical fiber and a core pitch of the cores of the multicore optical fiber may be less than or equal to 10%.

Claims20

Dependent claims

A power splitter, comprising:

a single-core optical fiber comprising:
a core;
an input end;
and
an output end;
a beam-splitting optical fiber comprising:
a polygonal core configured to output a multimode interference beam pattern comprising a plurality of beam spots;
an input end coupled to the output end of the single-core optical fiber;
and
an output end;
a graded-index optical fiber comprising:
a graded-index core;
an input end;
and
an output end;
a coreless optical fiber comprising:
an input end;
and
an output end;
and
a multicore optical fiber comprising:
a plurality of cores;
an input end;
and
an output end;
wherein:
the input end of one of the graded-index optical fiber or the coreless optical fiber is coupled to the output end of the beam-splitting optical fiber;
the output end of the other one of the graded-index optical fiber or the coreless optical fiber is coupled to the input end of the multicore optical fiber;
and
the graded-index optical fiber and the coreless optical fiber are configured for outputting a multimode interference beam pattern comprising a plurality of beam spots, wherein when the power splitter is in operation, a distance between neighboring beam spots of the multimode interference beam pattern output by the beam-splitting optical fiber is different from a distance between neighboring beam spots of the multimode interference beam pattern output by the graded-index optical fiber and the coreless optical fiber.

27 more elements

A power splitter, comprising:

a single-core optical fiber comprising:
a core;
an input end;
and
an output end;
a beam-splitting optical fiber comprising:
a polygonal core configured to output a multimode interference beam pattern comprising a plurality of beam spots;
an input end coupled to the output end of the single-core optical fiber;
and
an output end;
and
a multicore optical fiber comprising:
a plurality of cores;
an input end coupled to the output end of the beam-splitting optical fiber;
and
an output end;
wherein the power splitter is configured such that at least one of the following is satisfied:
a difference between a mode field diameter of the plurality of cores of the multicore optical fiber and a mode field diameter of the core of the single-core optical fiber is less than or equal to 50%;
or
when the power splitter is in operation, a difference between a distance between neighboring beam spots of the multimode interference beam pattern output by the beam-splitting optical fiber and a core pitch of the plurality of cores of the multicore optical fiber is less than or equal to 10%;
wherein when the power splitter is in operation, the power splitter further exhibits at least one of the following:
an insertion loss of the power splitter is less than or equal to 1 dB;
or
a power distribution variance among the plurality of cores of the multicore optical fiber is less than or equal to 10%.

21 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/357,865Filed 14 Oct 2025
Priority: 16 Oct 2024
Published: 16 Apr 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G02B 6/02042
Optical fibres with cladding with or without a coating: multicore optical fibres
G02B 6/2821
Forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers: using lateral coupling between contiguous…
G02B 6/2813
Using a mixing element which evenly distributes an input signal over a number of outputs: based on multimode interference effect, i.e. self-imaging
H01S 3/06737
Peculiar transverse fibre profile: fibre having multiple non-coaxial cores, e.g. multiple active cores or separate cores for pump and gain