Plastic optical fiber, plastic optical fiber cable, connector-attached plastic optical fiber cable, optical communication system, and plastic optical fiber sensor
A plastic optical fiber including a first cladding; a first core forming a first sea portion inside the first cladding; and a first island portion formed inside the first core with at least an outer periphery having a lower refractive index than the first sea portion, wherein the first core includes a polymethyl methacrylate-based resin.
1. A plastic optical fiber comprising:
a first cladding;
a first core forming a first sea portion inside the first cladding; and
a first island portion formed inside the first core with at least an outer periphery having a lower refractive index than the first sea portion,
wherein the first core comprises a polymethyl methacrylate-based resin.
2. The plastic optical fiber according to claim 1 , comprising a plurality of the first island portions.
3. The plastic optical fiber according to claim 1 , wherein the first island portion has a second cladding and a second core forming a second sea portion inside the second cladding.
4. The plastic optical fiber according to claim 3 , further comprising a second island portion inside the second core.
5. The plastic optical fiber according to claim 4 , wherein the second island portion has a structure in which one or more claddings and one or more cores are alternately formed in this order toward an inner direction.
6. The plastic optical fiber according to claim 1 , wherein when the plastic optical fiber comprises a plurality of cores, the respective cores constituting the optical fiber are formed of the same material.
7. The plastic optical fiber according to claim 1 , wherein a total of cross-sectional areas of the cores constituting the optical fiber accounts for 50% or more of an entire cross-sectional area of the optical fiber.
8. The plastic optical fiber according to claim 1 , wherein when the plastic optical fiber comprises a plurality of claddings, the respective claddings constituting the optical fiber are formed of the same material.
9. The plastic optical fiber according to claim 1 , wherein at least one of the claddings constituting the optical fiber is a fluororesin.
10. The plastic optical fiber according to claim 1 , comprising a layer having a lower refractive index than the first cladding, outside the first cladding.
11. The plastic optical fiber according to claim 1 , for use in distorted wiring.
12. The plastic optical fiber according to claim 1 , for use in multi-coupled wiring.
13. A plastic optical fiber cable comprising:
the plastic optical fiber according to claim 1 ; and
a resin coating the plastic optical fiber.
14. A connector-attached plastic optical fiber cable comprising:
the plastic optical fiber cable according to claim 13 ; and
connectors attached to both ends of the plastic optical fiber cable.
15. The connector-attached plastic optical fiber cable according to claim 14 , wherein the connectors are attached to the plastic optical fiber cable in a welded state.
16. An optical communication system comprising the plastic optical fiber according to claim 1 .
17. The optical communication system according to claim 16 , wherein the plastic optical fiber cable has a plurality of cores, and light passing through the cores comes from a same light source.
18. A plastic optical fiber sensor comprising the plastic optical fiber according to claim 1 .