• Deutsch
  • English
  • Search
  • ABOUT US
    • Profile
    • Organizational Structure
      • Supervisory Board
      • Board of Directors and Management
      • Scientific Directorate
      • Industrial Advisory Board
    • Economic Development
    • Projects
    • Partner universities and institutes
    • Spin-off companies
    • Committees and associations
    • Compliance and anti-corruption policy
    • Contact and map
    • Terms and Conditions
  • DEPARTMENTS
    • Optical Components
      • Photonic Materials Group
      • Smart Optical Devices Group
      • Optical Coatings Group
      • Optics Integration Group
    • Laser Development
      • Fiber Optics Group
      • Optical Systems Group
      • Solid-State Lasers Group
      • Ultrafast Photonics Group
    • Industrial and Biomedical Optics
      • Biophotonics Group
      • Food and Farming Group
    • Production and Systems
      • Additive Manufacturing – Polymers and Multi-Materials Group
      • Glass Group
      • Composites Group
      • Laser Micromachining Group
    • Materials and Processes
      • Additive Manufacturing - Metals Group
      • Joining and Cutting of Metals Group
      • Machines and Controls Group
      • Underwater Technology Group
      • Safety Technology Group
    • Services
  • BUSINESS AREAS
    • Additive Manufacturing
    • Medical Technology
    • Space Technology
  • SERVICES
    • Manufacturing processes and materials processing
      • Laser processing of composite materials
      • Laser processing of metals
      • Additive Manufacturing
      • Laser-based glass processing
      • Laser processing of organic materials
    • Optical components
      • Coating and thin-film technology
      • Characterization
    • Analysis techniques
      • Sample preparation
      • Analysis methods
    • Laser development
      • Consulting & development
      • Characterization
    • Consulting
      • Consulting
      • Feasibility studies
      • Laser and occupational safety
  • PUBLICATIONS
    • Press Releases
    • News
    • LZH News Subscription
    • Dissertations
    • Scientific Publications
    • LZH Videos
    • Laser Safety Database
  • JOBS & EDUCATION
    • Open Positions
    • Internships, student papers and theses
Laser Zentrum Hannover e.V.
LZH Publications

Development of a comprehensive 3D model for transversal mode instability investigations

  • Home
  • Development of a comprehensive 3D model for transversal mode instability investigations
S. Iakushev, M. Steinke, D. Kracht, J. Neumann, P. Weßels
Development of a comprehensive 3D model for transversal mode instability investigations
SPIE Proceedings Vol. 10683: Fiber Lasers and Glass Photonics: Materials through Applications , 1068337-1 - 1068337-8 (2018)
Publication type: Journal Article (non-reviewed)
DOI: 10.1117/12.2307421

Abstract

We have developed a comprehensive 3D steady-state numerical model of high power Yb-doped fiber amplifiers which allows the investigation of thermally induced multimode behavior being the reason for the transversal mode instabilities phenomenon. Numerical simulations show that for the pump powers above 3 kW the refractive index grating inscribed as a result of thermo-optic effect supports an efficient energy transfer from the main mode to high order modes. Coupling of the initial Gaussian beam without any shift or tilt to the investigated amplifier leads to the preferential excitation and further growth of symmetrical high order modes (LP02, LP03). Anti-symmetrical modes are not growing. Increasing the pump power leads to stronger mode coupling which is related to the increase of the amplitude and frequency of the temperature oscillations and corresponding refractive index oscillations over the longitudinal axis of the fiber amplifier.

Social Networks

  • Twitter
  • RSS

 

  • ABOUT US
    • Profile
    • Organizational Structure
      • Supervisory Board
      • Board of Directors and Management
      • Scientific Directorate
      • Industrial Advisory Board
    • Economic Development
    • Projects
    • Partner universities and institutes
    • Spin-off companies
    • Committees and associations
    • Compliance and anti-corruption policy
    • Contact and map
    • Terms and Conditions
  • DEPARTMENTS
    • Optical Components
      • Photonic Materials Group
      • Smart Optical Devices Group
      • Optical Coatings Group
      • Optics Integration Group
    • Laser Development
      • Fiber Optics Group
      • Optical Systems Group
      • Solid-State Lasers Group
      • Ultrafast Photonics Group
    • Industrial and Biomedical Optics
      • Biophotonics Group
      • Food and Farming Group
    • Production and Systems
      • Additive Manufacturing – Polymers and Multi-Materials Group
      • Glass Group
      • Composites Group
      • Laser Micromachining Group
    • Materials and Processes
      • Additive Manufacturing - Metals Group
      • Joining and Cutting of Metals Group
      • Machines and Controls Group
      • Underwater Technology Group
      • Safety Technology Group
    • Services
  • BUSINESS AREAS
    • Additive Manufacturing
    • Medical Technology
    • Space Technology
  • SERVICES
    • Manufacturing processes and materials processing
      • Laser processing of composite materials
      • Laser processing of metals
      • Additive Manufacturing
      • Laser-based glass processing
      • Laser processing of organic materials
    • Optical components
      • Coating and thin-film technology
      • Characterization
    • Analysis techniques
      • Sample preparation
      • Analysis methods
    • Laser development
      • Consulting & development
      • Characterization
    • Consulting
      • Consulting
      • Feasibility studies
      • Laser and occupational safety
  • PUBLICATIONS
    • Press Releases
    • News
    • LZH News Subscription
    • Dissertations
    • Scientific Publications
    • LZH Videos
    • Laser Safety Database
  • JOBS & EDUCATION
    • Open Positions
    • Internships, student papers and theses

Contact

Laser Zentrum Hannover e.V.
Hollerithallee 8
30419 Hannover
Germany
Map & Hotel
Phone:
+49 511 2788-0
Fax:
+49 511 2788-100
E-Mail:
info@lzh.de
  • Privacy statement
  • Data Protection Officer
  • Imprint
  • Contact & Map

Copyright ©2021 Laser Zentrum Hannover e.V. All Rights Reserved.