LVF Catalog

Fluoride Glass Fibers

Active Fibers

RE doped double cladding fibers

Thanks to their high RE solubility (up to 100 000 ppm) and low phonon energy, LVF fluoride fibers offer dozens of active transitions, enabling a broad range of application possibilities from visible to midinfrared.

We have a large stock  of ZFG or IFG double cladding single mode fibers.

Most of them exhibit a double D-shape on the first cladding in order to improve the pump absorption.

Doped with:  Er, Dy, Ho, Tm…
Codoped with: Pr/Yb…

We have also a stock of multimode double cladding fibers doped with Er, Tm, Pr… or co-doped Tm/Ho…

Hereinbelow, some significant realizations obtained by research labs with LVF RE-doped fibers:

Rare earth
Molar content (ppm)
∅core/clad (µm)
λc (*) (µm)
Specificity
Realization
Publication
Er
70 000
15/240*260/290
2.5
2xD-Shape
41 W CW laser at 2.94 µm
Aydin, 2018
Femtosecond (fs) laser at 2.8 µm
Duval, 2016
fs laser tunable from 2.8 up to 3.6 µm
Duval, 2016
In-amplifier supercontinuum
Gauthier, 2015
Er
50 000
10/240*260/290
2.5
2xD-Shape
NEW FIBER DESIGN (2019)
Er
70 000
15/240*260/290
2.5
2xD-Shape Polarization maintaining
NEW FIBER DESIGN (2019)
Er
10 000
16.5/240*260/290
2.7
2xD-Shape
Polymer ablation
Frayssinous, 2018
5.6 W CW at 3.55 µm
Maes, 2017
Ho
100 000
16/90*100/155
4.2
2xD-Shape
200 mW CW at 3.92 µm
Maes, 2018
Pr/Yb
3000 / 20000
2xD-Shape
Visible emission at 491, 520, 535 and 620 nm
(**)
undoped
14/250/290
2.3
single-mode
(**)
undoped
230/260/290
multimode

(*)λc = cut-off wavelength

 Fiber dimensions: Øcore/ Øclad1A* D1B/ Øclad2
Clad 1 = Øclad1A cladding with 2 D-shapes, separated of D1B
Clad 2 =
Øclad2 second cladding = low index resin

(**) The undoped double-cladding fiber was designed for high power laser generation. The double cladding will enable you to inject the pump into the first cladding instead of the core of the doped fiber and thus distribute the pump absorption in the first meters of the fiber.

Double clad

Standard price available
in our catalog on-line

CUSTOMIZE
your own RE doped double cladding fiber 

  • Doping/co-doping (rare earth, molar content)
  • Cut-off wavelength (single mode)
  • Custom NA (single mode)
  • Core size: ≥ 1 µm single mode), up to 1000 µm (multimode)

All our fibers are available as fiber patch cables or fiber bundles
You have requirements about high power laser delivery?
LVF proposes IR screened fibers and endcaps solutions.