Fiber laser system with mechanism for inducing parasitic light losses

US10978848B2 · kind B2 · utility

Assignee

• IPG PHOTONICS CORPORATION · US

Inventors

• Andrey Mashkin · Burbach, DE
• Valentin Fomin · Münster, DE
• Fedor SHCHERBINA · Burbach, DE
• Alexander Dronov · Oxford, US
• Andrey Abramov · Foster City, US
• Vadim MIRONOV · Oxford, US
• Eugene Scherbakov · Burbach, DE

Key dates

• Filing date: Jun 30, 2017
• Grant date: Apr 13, 2021
• Expiry date: Oct 22, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S2301/03
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A method of inducing light losses at a parasitic wavelength in a fiber laser system includes providing a wavelength discriminator (WD) spaced from and between feeding and process fibers or from the end output of the feeding fiber so as to induce losses of light at parasitic wavelength. The device implementing the disclosed method is configured with a laser source, the delivery fiber and WD spaced at a distance between the surface to be treated and the end of the delivery fiber, wherein the WD receives the parasitic light over free space and is configured as a dichroic filter inducing losses to the light at the parasitic wavelength.