Tm/Ho Doped Fibers

Lasers & Amplifiers Fibers

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For fiber lasers from 1.9 to 2.2 µm

iXblue proposes a wide range of Thulium/Holmium doped optical fibers for amplifiers and fiber lasers.

For high power CW and pulsed lasers ~2 µm

Triple clad design to be used in high power regime for amplifiers and fiber lasers configuration.


Benefits & Features

  • CW and pulsed fiber lasers @ 2 µm
  • High pump and consistent absorption
  • Low M² and NA
  • Large mode area
  • High efficiency
  • High Tm₂0₃ concentration
  • High efficiency
  • Heat dissipation
  • Eye-safe lasers


  • 2 µm CW & pulsed lasers
  • 2 µm amplifiers
  • Military and commercial LIDAR
  • Laser weapon

Main Specifications



Polarization Maintaining (PM)
Fiber type
Product Specification Datasheet
Double Clad Fibers
Non-PM types
IXF-2CF-TmHo-O-6-130-0.21 6 µm core diameter PDF More info
IXF-2CF-TmHo-O-25-250 24 µm core diameter PDF More info
PM types
IXF-2CF-TmHo-PM-6-130-0.21 6 µm core diameter
PM Panda structrure
PDF More info
IXF-2CF-TmHo-PM-20-300 20 µm core diamater
PM Panda structure
PDF More info
Triple Clad Fibers
PM types
IXF-3CF-TmHo-PM-18-270-300-0.09 18 µm core diameter
PM Panda structure
PDF More info


  • Optimizing the performance of a monolithic Tm3+, Ho3+-codoped fiber laser by FBG reflected wavelength and fiber gain matching

    Arnaud Motard, Christophe Louot, Inka Manek-Hönninger, Nicolas Dalloz, and Anne Hildenbrand-Dhollande

    Optics Express Vol. 31, Issue 12, pp. 18939-18948 (2023)

    The gain medium is a silica double clad (DC) polarization-maintaining (PM) Thulium-Holmium Doped Fiber (THDF) from exail exhibiting a codoped (Tm3+ Ho3+) core of 20 µm diameter (NA = 0.11) and a 300-µm circular pump cladding (NA = 0.46). All FBGs utilized in this study were produced by exail.

  • P195-w continuous wave laser emission at 2.09 μm from a Tm3+,Ho3+-codoped single-oscillator monolithic fiber laserower efficient all-fiberized 12-core erbium/ytterbium doped optical amplifier

    C. Louot, A. Hildenbrand-Dhollande, N. Dalloz, A. Motard (French-german research Institute of Saint-Louis); T. Robin, B. Cadier (iXblue); I. Manek-Hönninger (Université Bordeaux, CNRS CEA, CELIA)

    OSA Laser Congress – OCTOBER 2020

    We report on a high efficiency (45%) single-oscillator monolithic Tm3+, Ho3+-codoped fiber laser emitting 195 W at 2.09 µm in CW mode of operation, with a beam quality near the diffraction limit (M2 = 1.08).

    Learn more
  • Ixnews 2018 photonics west special issue: erbium-ytterbium doped optical fibers

    T. Robin (iXblue)

    iXnews Photonics West Special Issue CTO iXblue Specialty Fibers division, on Er/Yb doped optical fibers Volume, #1 p.3 – 37 – January 2018

    When iXFiber was created in 2006, most of the team had some experience with Erbium-Ytterbium co-doped double clad fibers.