High Power In-Band Pumped, Triple Clad Thulium Fiber and Laser Modeling Software

Technology #2021-093

Key Points

  • A thulium fiber geometry technology for in-band optical laser pumping
  • Technique of in-band pumping in the 2 μm band allows for optical pumping efficiencies of more than 80% across most of the operating bandwidth
  • Offers the potential to provide greater than 5 kW continuous-wave output power across the 1950-2100 nm region

Abstract

The University of Central Florida invention is a thulium fiber geometry design specifically geared for in-band pumping. Thulium-doped fiber lasers have gained much interest recently in the field of directed energy because of the potential to create eye-safe sources at 2 μm. This design will take advantage of the higher efficiencies and lower thermal load of in-band pumping. The triple cladding design offers the best balance between thermal effects, modulation instability threshold and pump absorption. This geometry has the potential to provide greater than 5 kilowatts (kW) of continuous wave (CW) output power across the 1950-2100 nanometer (nm) region. Thulium-doped fiber lasers have gained much interest recently in the field of directed energy.

Benefit

  • Thulium fiber geometry design allows for power scaling beyond 1 kW
  • Software code comprehensively addresses and models modulation instability

Market Application

  • Defense
  • High-energy laser manufacturing
  • Scientists or engineers who model high power, CW fiber lasers and amplifiers