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 mid-infrared.
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:
Molar content (ppm)
λc (*) (µm)
41 W CW laser at 2.94 µm
Femtosecond (fs) laser at 2.8 µm
fs laser tunable from 2.8 up to 3.6 µm
NEW FIBER DESIGN (2019)
2xD-Shape Polarization maintaining
Linearly polarized mode-locking laser around 2.8 µm
15 W CW at 3.55 µm
200 mW CW at 3.92 µm
2.3 W CW visible laser at 635 nm
(*)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.
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)