Multicore optical fiber with low group delay
AssigneeCorning Incorporated
InventorMing-Jun Li
Life of this patent
Estimating the term…
Abstract
A multicore optical fiber is provided including a first core region having a first refractive index profile, a second core region having a second refractive index profile, wherein the first core region is separated from the second core region by a separation distance in a range of 20-50 μm, and an outer cladding surrounding the first and second core regions, wherein the first core region exhibits a first effective index and a first group index and the second core region exhibits a second effective index and a second group index, and the first and second effective indices are substantially different to suppress crosstalk and the first and second group indices are substantially the same to achieve a substantially similar group velocity.
Claims18
A multicore optical fiber comprising:
- a first core region having a first refractive index profile;
- a second core region having a second refractive index profile, wherein the first core region is separated from the second core region by a separation distance in a range of 20-50 μm;
- an outer cladding surrounding the first and second core regions, wherein the first core region exhibits a first effective index and a first group index and the second core region exhibits a second effective index and a second group index, wherein the first and second effective indices are different to suppress crosstalk and the first and second group indices are substantially the same to achieve a substantially similar group velocity, wherein the first and second core regions are single-moded, and wherein the first and second core regions have a group delay difference below 1 ps/km.
A multicore optical fiber comprising:
- a first core region having a first refractive index profile and a first core having a first core size;
- a second core region having a second refractive index profile and a second core having a second core size different from the first core size, wherein the first core region is separated from the second core region by a separation distance in a range of 20-50 μm;
- and
- an outer cladding surrounding the first and second core regions, wherein the first core region exhibits a first effective index and a first group index and the second core region exhibits a second effective index and a second group index, wherein the first and second effective indices are substantially different to suppress crosstalk and the first and second group indices are the same to achieve a substantially similar group velocity, wherein a difference between the first and second effective indices is greater than 1×10−5 and a difference between the first and second group indices of the first and second core regions is less than 1×10−3, wherein the first and second core regions are single-moded, and wherein the first and second core regions have a group delay difference below 1 ps/km.
Dependencies are inferred from the claim text.