Optical Fibres
Actives Fibres
Ytterbium Doped Fibres - VLMA
Ultra-fast pulsed fibre lasers/amplifiers
Very Large Mode Area
The development of the new Polarisation Maintaining (PM), ytterbium-doped, Very Large Mode Area (VLMA) fibre was driven by a demand for an easy-to-integrate double-clad fibre in the growing ultrafast fibre laser market. The combination of a robust single mode behaviour with an all-solid doped silica structure with a fundamental mode area of 750 μm² makes this fibre an ideal tool for high-end industrial fibre laser manufacturers. A proprietary manufacturing process (1) enables preferential fibre coiling direction and automatic orientation of the amplifier output polarization. Matching GRIN fibres and passive VLMA fibres are available for monolithic integration with standard LMA 10-125 PM pump combiners. Module assembly also available on request.
(1) Photonics Bretagne patent.
Main characteristics
- Truly single mode polarization maintaining behaviour
- All-solid step index-based fibre design based on our vapour phase delivery process
- Industry standard low-index polymer coating providing long term reliability & and performance
- Excellent fibre lot uniformity and consistency
- Photodarkening-free silica matrix
Applications
- High power ultrafast pulsed fibre lasers/amplifiers for material processing, life science, spectroscopy or defense applications.
References
- Scientific Publication – “Efficient single-mode operation in a 10 dB/m absorption very-large-mode-area ytterbium-doped optical fiber via curvature-induced mode filtering”
- Poster – “All-solid VLMA Yb-Doped Single-Mode PM Fiber with 10dB/m Absorption for High Power Compact Laser Applications”
- Scientific Publication – “Sub 500 fs high power quasimonolithic FCPA laser using an all-solid step-index flexible PM VLMA Yb-doped fiber amplifier”