US 12,169,302 B1
Bending-resistant low-crosstalk photonic orbital angular momentum fiber waveguide
Wei Chen, Shanghai (CN); Fufei Pang, Shanghai (CN); Tinyun Wang, Shanghai (CN); Sujuan Huang, Shanghai (CN); Xiaobei Zhang, Shanghai (CN); Jianxiang Wen, Shanghai (CN); Yanhua Dong, Shanghai (CN); Yi Huang, Shanghai (CN); Ying Zhang, Shanghai (CN); and Yang Wang, Shanghai (CN)
Assigned to SHANGHAI UNIVERSITY, Shanghai (CN)
Appl. No. 18/709,269
Filed by SHANGHAI UNIVERSITY, Shanghai (CN)
PCT Filed Jan. 4, 2023, PCT No. PCT/CN2023/070373
§ 371(c)(1), (2) Date May 10, 2024,
PCT Pub. No. WO2023/138370, PCT Pub. Date Jul. 27, 2023.
Claims priority of application No. 202210067754.3 (CN), filed on Jan. 20, 2022.
Int. Cl. G02B 6/036 (2006.01); G02B 6/02 (2006.01); G02B 6/028 (2006.01)
CPC G02B 6/03611 (2013.01) [G02B 6/02042 (2013.01); G02B 6/0285 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A bending-resistant low-crosstalk photonic orbital angular momentum fiber waveguides, wherein the fiber sequentially consists of a first core layer, a second core layer, a first cladding layer, a second cladding layer, and a third cladding layer from the center outward, with the third cladding layer being the thickest, followed by the first core layer, and the first cladding layer being the thinnest; the refractive index of the first cladding layer is the smallest, followed by the second cladding layer, and the refractive index of the second core layer is the largest; the relationship function relationship A between the radii r1 of the first core layer and r2 of the second core layer satisfies A=k1×10×log(r2/r1)/(L−2), where k1 ranges from 0.36 to 1.52, L ranges from 3 to 9, and A ranges from 0.06446 to 1.61151; the relationship function B between the radius r3 of the first cladding layer and the radius r2 of the second core layer satisfies B=k2×10×log (r3/r2)×(L−2), where k2 ranges from 0.66 to 1.37, L ranges from 2 to 9, and B ranges from 0 to 3.4649; the refractive index difference between the first core layer refractive index n1 and the third cladding layer refractive index n5 is from −0.00029 to −0.01603; the refractive index difference between the second core layer refractive index n2 and the third cladding layer refractive index n5 is from 0.017485 to 0.037885; the refractive index difference between the first cladding layer refractive index n3 and the third cladding layer refractive index n5 is from −0.005 to −0.0153; the refractive index difference between the second cladding layer refractive index n4 and the third cladding layer refractive index n5 is from −0.005 to −0.0153; the refractive index curve of the second core layer refractive index n2 gradually changes and satisfies the refractive index profile distribution function:

OG Complex Work Unit Math
g is the refractive index profile distribution parameter, and g ranges from −2 to 9.