LVF - Le Verre Fluore - Fibers - RAM N.S Technologies

LVF is the world leading manufacturer of fluoride glass and germanate glass fibers. LVF product portfolio offers a broad range of solutions for applications ranging from UV to mid-IR spectrum: rare earth-doped and undoped single mode and multimode fibers, Er-YAG and Er-YSSG laser delivery fibers, patch cables, bundles, probes, hermetic feedthroughs, flow cells, fiber components, fiber modules, fluorescent solid-state dyes…

Markets : medical, industry, ecology, communications, astronomy…

Passive fibers

Le Verre Fluoré fluoride fibers can be separated in three main categories :

ZFG (Zirconium ZrF4 Fluoride Glass) = fluorozirconate fibers
Exhibit a high transparency from 0.3 up to 4.5µm (see graph below)

IFG (Indium InF3 Fluoride Glass) = fluoroindate fibers
Exhibit a high transparency from 0.3 up to 5.5µm (see graph below)

AFG (Aluminium AlF3 Fluoride Glass) = fluoroaluminate fibers, generally used for end-capping solutions.

Multimode fibers

Cut-back background losses:

ZFG: Typ < 10dB/km at 2560nm
IFG: Typ < 10dB/km at 3670nm

Operation wavelengths (<1dB/m):

ZFG: 0.32-4.3µm
IFG: 0.335-5.3µm

Active fibers

Since the discovery of ZBLAN glasses in 1974, Le Verre Fluoré has worked to develop a large range of fluoride optical fibers, including ZrF4, InF3 and AlF3 based optical fibers, designed for mid-infrared applications.

Le Verre Fluoré fluoride fibers can be separated in three main categories :

ZFG (Zirconium ZrF4 Fluoride Glass) = fluorozirconate fibers
Exhibit a high transparency from 0.3 up to 4.5 µm (see graph below)

IFG (Indium InF3 Fluoride Glass) = fluoroindate fibers
Exhibit a high transparency from 0.3 up to 5.5 µm (see graph below)

AFG (Aluminium AlF3 Fluoride Glass) = fluoroaluminate fibers, generally used for end-capping solutions.

Multimode fibers

Cut-back background losses:

ZFG: Typ < 10dB/km at 2560nm
IFG: Typ <10dB/km at 3670nm

Operating wavelengths (<1dB/m):

ZFG: 0.32-4.3µm
IFG: 0.335-5.3µm

Thanks to their high rare earth solubility (Er, Ho, Tm, Dy, Pr, Yb, Nd, Ce, Sm… up to 100 000 ppm) and low phonon energy, dozens of transitions are active in fluoride glasses. As a result, combined to their high transparency, fluoride fibers are used to generate lasers in mid-infrared range, but also in visible range.

APPLICATIONS

5 product lines and their applications

– Visible, NIR and mid-infrared fiber lasers :
medical applications, sensors, material processing
– MIR supercontinuum sources :
mid-IR spectroscopy, OCT, infrared countermeasures
– Fiber amplifiers :
telecommunications
– Multimode or single mode light transmission from UV (300 nm) to mid-IR (5500 nm) :
high power laser delivery (new product : multimode germanate fibers) industrial and environmental spectroscopy, astronomy (telescopes coupling)
– Undoped or rare-earth doped bulks, prisms and tubes :
visible and midinfrared solid-state lasers and waveguides light converters (UV et visible) fluorescent solid-state dyes (ADN sequencing)

LVF Key components for NIR and MIR spectroscopy
Fiber patch cables, hermetic feedthroughs and flow cells
Fiber combiners for mid-IR laser diodes (ICL/QCL)
Fiber modules for mid IR supercontinuum lasers (up to 5μm and up to 9.5μm)
Targazh industrial sensor
MEDICAL
• Surgery, Ophtalmology, Osteotomy, Dentistry, Dermatology
• 3D living cells bio printing (skin, breast)
• Super-resolution microscopy, Cytometry, Ophtalmology
• DNA sequencing
• Cancer detection
LVF Key components
CW and pulsed 2.9μm laser (using Er doped fiber)
Multiwatts visible lasers and amplifiers
Passive fibers for mid-IR transmission
Er-YAG/Er-YSGG laser delivery (up to 1.5J/pulse)
Rare earth-doped fluoride glass fluorescent dyes
GROUND and SPACE COMMUNICATIONS
• Telescopes coupling
• Ground-to-ground and ground-to-space communication,
O-Band and S-band telecom amplifiers
• High bit rate LIFI communications
LVF Key components
Passive ZBLAN fiber sub-systems
Rare earth doped fiber modules
3.9 μm pulsed laser
R G B pulsed fiber lasers