US 11,921,366 B2
Optical systems comprising multi-core optical fibers for realizing direct core to core coupling
Rostislav Radiyevich Khrapko, Corning, NY (US); Sukru Ekin Kocabas, Corning, NY (US); Robert Adam Modavis, Painted Post, NY (US); Daniel Aloysius Nolan, Corning, NY (US); and Jun Yang, Horseheads, NY (US)
Assigned to Corning Incorporated, Corning, NY (US)
Appl. No. 17/295,512
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Nov. 7, 2019, PCT No. PCT/US2019/060247
§ 371(c)(1), (2) Date May 20, 2021,
PCT Pub. No. WO2020/106463, PCT Pub. Date May 28, 2020.
Claims priority of provisional application 62/770,249, filed on Nov. 21, 2018.
Prior Publication US 2022/0026749 A1, Jan. 27, 2022
Int. Cl. G02F 1/125 (2006.01); G02B 6/02 (2006.01)
CPC G02F 1/125 (2013.01) [G02B 6/02042 (2013.01); G02B 6/02095 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A multicore optical fiber comprising:
a plurality of cores disposed in a cladding, wherein:
the plurality of cores comprise a first core and a second core; and
the first core comprises a first propagation constant β1, the second core comprises a second propagation constant β2, the cladding comprises a cladding propagation constant β0, and

OG Complex Work Unit Math
wherein:
the first core and the second core comprise a modal mismatch M12;

OG Complex Work Unit Math
where C12 is a coupling coefficient for coupling from the first core to the second core; and
M12 is greater than 10.