IPG Photonics

About: IPG Photonics is a based out in . It is known for research contribution in the topics: Laser & Fiber laser. The organization has 903 authors who have published 1241 publications receiving 63339 citations.

Method of sum-frequency conversion and frequency converter with optical active rotator

Abstract: A method for sum --frequency conversion of coherent radiation includes generating two linearly polarized waves which coliinearly propagate in respective first and second non- coinciding planes at different first and second frequencies f1≠ f2, respectively. The waves are further guided through an active crystal which rotates the waves at different angles Ψ1 and Ψ2 determined as Ψ1 = ρ(f1)⋅L Ψ2 = ρ (f2)⋅L, where L is a length of the active crystal, and ρ(f1) and ρ (f2) specific rotations of respective frequencies f1≠ f2. Finally the rotated waves are incident on a non-linear crystal configured to sum frequency the wave to generate a third harmonic.

Method and Device for Fabricating Volume Bragg Gratings

Abstract: A system for recording multiple volume Bragg gratings (VBGs) in a photo thermo-refractive material is configured to implement a method which provides for irradiating the material by a coherent light through a phase mask The system has a plurality of actuators operative to displace the light source, phase mask and material relative to one another so as to mass produce multiple units of the material each having one or more uniformly configured VBGs

Ultra-High Power Multimode Combiner

Abstract: An ultra-high power fiber laser system includes a multimode combiner which is configured with a plurality of low mode fibers bundled together and tapering toward its downstream end. The system further includes a clad mode absorber extending along the tapered downstream end of the combiner and extending over a portion of the combiner's output fiber. The absorber is configured with sequentially located zones which are provided with respective refractive indices. In a forward propagating direction of light signal, the upstream zone includes polymeric material with the refractive index higher than that of the cladding of the combiner end fiber. This zone is configured to remove the back reflected core guided light bled into the cladding of the combiner through a splice between combiner end and output fibers. The intermediate zone includes polymeric material configured with a refractive index lower than that of the cladding of the combiner output fiber so it can prevent clad guided signal light from decoupling the cladding under the material. The downstream zone is configured with polymeric material having a refractive index lower than that of the cladding of the combiner output fiber. The polymeric material of the downstream zone is impregnated with a plurality of light diffusers scattering high numerical aperture rays of the clad-guided signal light.

High power metal clad mode absorber

Abstract: A clad absorber unit is provided on a passive fiber of a high power fiber laser system and operative to trap and remove high order modes propagating along the clad of the passive fiber. The mode absorber has a composition made from one or more liquid metals and alloys thereof which are placed in the opening formed in the sheath of the passive fiber. The composition is configured to remove from the cladding the MM light having a predetermined light power which heats the composition at a temperature lower than a threshold temperature at which the absorber may be damaged.

Recent technical and marketing developments in high power fiber lasers

Abstract: The presentation will discuss recent advances in high power fiber lasers, including new and future fiber laser offerings. Also a review of the impact that fiber lasers are making in the material processing market and new applications that fiber lasers have developed.