Planar optical waveguide
View Patent ↗A method for creating a master and for generating an optical waveguide therefrom. The method includes creating a waveguide master having the geometrical form of at least one optical element formed therein; and generating an embossed optical waveguide from the master, the embossed optical waveguide being a negative of the master, the embossed optical waveguide having an optical element formed therein which corresponds to and is a negative of the geometrical form of the optical element formed in the master, the embossed optical waveguide being formed of a polymer material having a first index of refraction, wherein the optical element is formed in the polymer material and creates a local modification of the refractive index of the polymer material.
1. A method for creating an optical waveguide, said method comprising the steps of:
creating a waveguide master having the geometrical form of at least one optical element formed therein;
generating an embossed optical waveguide from said master, said embossed optical wavegulde being a negative of said master, said embossed optical waveguide having at least one refractive optical element formed therein which corresponds to and is a negative of the geometrical form of said at least one optical element formed in said master, said embossed optical waveguide comprised of a polymer material, said polymer material having a first index of refraction, wherein said at least one refractive optical element is formed in said polymer material, wherein said at least one refractive optical element formed in said polymer material creates a local modification of the refractive index of said polymer material, wherein said local modification of the refractive index of said polymer material causes light refracted by said at least one optical element formed in said polymer material to be operated on in a predetermined manner by said at least one optical element formed in said polymer material.
2. A method for creating an optical waveguide according to claim 1 further including the step of:
bonding a substrate to said polymer material, said substrate having known optical and mechanical characteristics, such that when light projected into said embossed optical waveguide impinges on said substrate it is reflected such that it continues to propagate in said embossed optical waveguide.
3. A method for creating an optical waveguide according to claim 1 wherein said master is comprised of metal.
4. A method for cleating an optical waveguide according to claim 1 wherein said embossed optical waveguide is generated by placing a layer of liquid photopolymer in contact with said master, exposing said liquid photopolymer to curing radiation which cures the liquid photopolymer, and separating said cured photopolymer from said master, said cured photopolymer corresponding to said polymer material.
5. A method for creating an optical waveguide according to claim 4 wherein prior to exposing said layer of liquid photopolymer to curing radiation, said substrate is placed in contact with said layer of liquid photopolymer such that during exposure of said liquid photopolymer to the curing radiation, said substrate bonds to the cured layer of photopolymer.
6. A method for creating an optical waveguide according to claim 1 , wherein said at least one refractive optical element formed in said polymer material Is formed therein by selectively altering the refractive index of a portion of the polymer material.
7. A method for creating an optical waveguide according to claim 1 , wherein said at least one refractive optical element formed in said polymer material is formed therein by creating one or more holes in the polymer material.
8. A method for creating an optical waveguide according to claim 7 , wherein at least one of the holes in the polymer material is created through use of reactive ion etching, ion beam milling, electron beam lithography, or a chemical wash, or combinations of two or more thereof.
9. A method for creating an optical waveguide said method comprising the steps of:
creating a waveouide master having the geometrical form of at least one optical element formed therein;
generatin an embossed optical waveguide from said master, said embossed optical waveguide being a negative of said master, said embossed optical waveguide having at least one optical element formed therein which corresoonds to and is a negative of the geometrical form of said at least one optical element formed in said master, said embossed optical waveguide comprised of a polymer material, said polymer material having a first index of refraction, wherein said at least one optical element is formed in said polymer material, wherein said at least one optical element formed in said polymer material creates a local modification of the refractive index of said polymer material, wherein said local modification of the refractive index of said polymer material causes light impinging on said at least one optical element formed in said polymer material to be operated on in a predetermined manner by said at least one optical element formed in said polymer material
wherein said step of creating said master comprises the step of exposing a layer of liquid photopolymer to curing radiation through a mask, wherein the mask controls the exposure of said liquid photopolymer such that certain parts of said liquid photopolymer become cured and certain parts of said liquid photopolymer remain uncured, wherein the uncured parts are subsequently removed for said master to be used to form said at least one refractive optical element in said optical waveguide.
10. A method for creating an optical waveguide according to claim 9 wherein said step of creating said master further comprises the step of reactively ion etching certain parts of said cured photopolymer to form additional optical elements therein.
11. A method for creating an opticaI waveguide according to claim 9 wherein said step of creating said master further comprises the step of ion beam milling certain parts of said cured photopolymer to form additional optical elements therein.
12. A method for creating an optical waveguide according to claim 9 wherein after the uncured parts of said liquid photopolymer have been removed said master is electroplated with metal to create a metal master.
13. A method for creating an optical waveguide said method comprising the steps of:
creating a waveguide master having the geometrical form of at least one optical element formed therein;
generating an embossed optical waveguide from said master, said embossed optical waveguide being a negative of said master, said embossed optical waveguide having at least one optical element formed therein which corresponds to and is a negative of the geometrical form of said at least one optical element formed in said master, said embossed optical waveguide comprised of a polymer material, said polymer material having a first index of refraction, wherein said at least one optical element is formed in said polymer material, wherein said at least one optical element formed in said polymer material creates a local modification of the refractive index of said polymer material, wherein said local modification of the refractive index of said polymer material causes light impinging on said at least one optical element formed in said polymer material to be operated on in a predetermined manner by said at least one optical element formed In said polymer material
wherein said step of creating said master comprises the step of exposing a polymeric resist to a pattern of exposing radiation, wherein the pattern of exposure of said resist after its solubility in a developing solution, wherein a pattern of resist is subsequently removed by development for said master to be used to form said at least one optical element in said optical waveguide.
14. A method for creating an optical waveguide according to claim 13 wherein said step of creating said master further comprises the step of reactively ion etching certain parts of said photoresist to form additional optical elements therein.
15. A method for creating an optical waveguide according to claim 13 wherein said step of creating said master further comprises the step of ion beam milling certain parts of said photoresist to form additional optical elements therein.
16. A method for creating an optical waveguide according to claim 13 wherein after the pattern of photoresist has been developed said master is electroplated with metal to create a metal master.
17. A method for creating an optical waveguide a portion of said method comprising the steps of:
creating a waveguide master having the geometrical form of at least one optical element formed therein;
generating an embossed optical waveguide from said master, said embossed optical waveguide being a negative of said master, said embossed optical waveguide having at least one optical element formed therein which corresponds to and is a negative of the geometrical form of said at least one optical element formed in said master, said embossed optical waveguide comprised of a polymer material, said polymer material having a first index of refraction, wherein said at least one optical element is formed in said polymer material, wherein said at least one optical element formed in said polymer material creates a local modification of the refractive index of said polymer material, wherein said local modification of the refractive index of said polymer material causes light impinging on said at least one optical element formed in said polymer material to be operated on in a predetermined manner by said at least one optical element formed in said polymer material
wherein said step of creating said master comprises the step of exposing a portion of a layer of liquid photopolymer to curing radiation and controlling the exposure of said liquid photopolymer such that a portion of said liquid photopolymer becomes cured and another portion of said liquid photopolymer remains uncured, wherein an uncured part is subsequently removed for said master to be used to form said at least one optical element in said optical waveguide.