Optical waveguide exhibiting strongly positive dispersion, and system utilizing same
AssigneeLaserComm Inc.
InventorsMichael Lysiansky, Michael Rosenblit, Huailiang Wei
Life of this patent
Estimating the term…
Abstract
An optical waveguide designed to generate positive dispersion when operated in a high order mode. The optical waveguide in one embodiment is designed to generate positive dispersion slope, in another embodiment to generate negative dispersion slope and in yet another embodiment nominally zero dispersion slope. In one embodiment the high order mode is the LP02 mode and in another embodiment the high order mode is the LP03 mode. In another embodiment the optical waveguide is a few mode fiber. In an exemplary embodiment the optical waveguide is used in combination with a mode transformer, such as a transverse mode transformer to achieve the desired high order mode.
Claims20
An optical waveguide having a refractive index profile pre-selected to generate positive dispersion when operated substantially in a single high order mode, such that the total dispersion of said waveguide, equal to the sum of the material dispersion and the waveguide dispersion is greater than 50 ps/nm/km at a given wavelength within the operative range.
A method of generating positive dispersion comprising the steps of;
- providing an optical waveguide having a refractive index profile pre-selected to generate positive waveguide dispersion when operating in substantially a single high order mode, and
- operating said optical waveguide in said single high order mode in an operative range, whereby the total dispersion of said waveguide, equal to the sum of the material dispersion and said waveguide dispersion is greater than 50 ps/nm/km at a given wavelength within said operative range.
An apparatus for introducing positive dispersion to an optical signal comprising;
- at least one mode transformer;
- an optical waveguide having a refractive index profile pre-selected to generate positive dispersion to the optical signal when operated substantially in a single high order mode, said optical waveguide being in optical communication with the output of said mode transformer;
- whereby said optical signal is output from said mode transformer in said high order mode, and the output of said mode transformer is an optical signal substantially in said single high order mode.
Dependencies are inferred from the claim text.