DEVICE FOR COUPLING PUMP LIGHT INTO A FIBER AND METHOD FOR PRODUCING A DEVICE OF THIS TYPE
First Claim
1. A device for laterally coupling pump light into a fiber comprising the fiber which runs in a longitudinal direction (L) and which has an optically active medium to be pumped, with a lateral wall running approximately in the longitudinal direction (L) and with at least one light coupler, at least some part of which runs parallel to the fiber along the lateral wall, wherein the light coupler is an optical waveguide which is optically coupled to the fiber such that pump light propagating in the optical waveguide can be coupled into the fiber via the lateral wall, in particular by a mode crosstalk, or by overlap of evanescent fields, wherein the fiber has two or more pump sections, each running in the longitudinal direction (L) and arranged next to one another, between which an optical waveguide is in each case arranged, such that the optical waveguides are formed in a plate-formed wafer, wherein the device includes a coupling part with a flat contact surface for coupling pump light into the optical waveguide which lies against a flat lateral surface of the optical waveguide.
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Accused Products
Abstract
A device for laterally coupling pump light into a fiber. A fiber runs in a longitudinal direction, having an optically active medium to be pumped and a lateral wall running approximately in the longitudinal direction, and at least one light coupler, at least some part of which runs parallel to the fiber along the lateral wall. The light coupler is an optical waveguide which is optically coupled to the fiber such that pump light propagating in the optical waveguide can be coupled into the fiber via the lateral wall. The efficiency of the pump light coupling is improved by a plurality of windings of the fiber being located alternately with waveguides on a substrate. The pump light can be coupled into all waveguides simultaneously, for example by a prism.
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Citations
21 Claims
- 1. A device for laterally coupling pump light into a fiber comprising the fiber which runs in a longitudinal direction (L) and which has an optically active medium to be pumped, with a lateral wall running approximately in the longitudinal direction (L) and with at least one light coupler, at least some part of which runs parallel to the fiber along the lateral wall, wherein the light coupler is an optical waveguide which is optically coupled to the fiber such that pump light propagating in the optical waveguide can be coupled into the fiber via the lateral wall, in particular by a mode crosstalk, or by overlap of evanescent fields, wherein the fiber has two or more pump sections, each running in the longitudinal direction (L) and arranged next to one another, between which an optical waveguide is in each case arranged, such that the optical waveguides are formed in a plate-formed wafer, wherein the device includes a coupling part with a flat contact surface for coupling pump light into the optical waveguide which lies against a flat lateral surface of the optical waveguide.
- 13. A method for manufacturing a device for laterally coupling pump light into a fiber comprising the fiber which runs in a longitudinal direction (L) and which has an optically active medium to be pumped, with a lateral wall running approximately in the longitudinal direction (L) and with at least one light coupler, at least some part of which runs parallel to the fiber along the lateral wall, wherein the light coupler is an optical waveguide which is optically coupled to the fiber such that pump light propagating in the optical waveguide can be coupled into the fiber via the lateral wall, in particular by a mode crosstalk, or by overlap of evanescent fields, wherein the fiber has two or more pump sections, each running in the longitudinal direction (L) and arranged next to one another, between which an optical waveguide is in each case arranged, such that the optical waveguides are formed in a plate-formed wafer, wherein the device includes a coupling part with a flat contact surface for coupling pump light into the optical waveguide which lies against a flat lateral surface of the optical waveguide, said method including optical waveguides running next to one another in a plate-formed wafer, and in which a fiber with an optically active core is then laid, in a form-locking manner, in the spaces formed between the optical waveguides, and a coupling part with a flat contact surface for coupling pump light into the optical waveguide is laid against a flat lateral surface of the at least one optical waveguide.
Specification