LMA-YDF-25/250-VIII0 pages
25/250 Ytterbium-Doped
LMA Double Clad Fibers
Nufern’s 25/250 Ytterbium-doped double clad fiber is ideally suited for high peak power pulsed fiber amplifier applications.
Based on a waveguide structure that supports less modes than the 30/250 fiber, this fiber is incorporated into components
and monolithic designs where maintaining beam quality can be more difficult. Both non-PM and PANDA-style PM fibers are
available, as are a range of support fibers for component and pigtail development efforts. As with all Nufern standard Large
Mode Area (LMA) fibers, these fibers are proof-tested to 100 kpsi, an industry requirement for long term reliability when
coiling for mode filtering.
Typical Applications
Features & Benefits
• High peak power amplifiers
• NuCOAT™ fluoroacrylate coating — Greater fiber durability in extreme environmental operating & storage conditions
• LIDAR
• LMA core design and short amplifier length — Useful for generating high peak powers
• Material processing
• “Few” moded core design — Easy to maintain single mode LP01 beam through fiber & components
• Non-linear optics/frequency
• PANDA-style stress structure for increased birefringence — Superior optical performance and uniformity
doubling
• All fiber proof tested to > 100 kpsi — Critical for ensuring long term reliability when coiling
Optical Specifications
Operating Wavelength
Core NA
First Cladding NA (5%)
Cladding Attenuation
Cladding Absorption
Birefringence
PLMA-YDF-25/250-VIII
LMA-YDF-25/250-VIII
1060 – 1115 nm
0.060 ± 0.010
≥ 0.46
≤ 15.0 dB/km @ 1095 nm
1.70 ± 0.20 dB/m at 915 nm
5.10 dB/m near 975 nm
nominal 2 × 10⁻⁴
1060 – 1115 nm
0.060 ± 0.010
≥ 0.46
≤ 15.0 dB/km @ 1095 nm
1.60 ± 0.20 dB/m at 915 nm
4.80 dB/m near 975 nm
N/A
250.0 ± 10.0 µm
N/A
25.0 ± 2.5 µm
400.0 ± 20.0 µm
Low Index Polymer
≥ 100 kpsi (0.7 GN/m²)
N/A
250.0 ± 10.0 µm
25.0 ± 2.5 µm
400.0 ± 20.0 µm
Low Index Polymer
≥ 100 kpsi (0.7 GN/m²)
Geometrical & Mechanical
Specifications
Cladding Diameter
Cladding Diameter (flat-to-flat)
Core Diameter
Coating Diameter
Coating Material
Prooftest Level
The passive version of each fiber is also available.
Precision matched fiber sets are also available - see PLMA-YDF-25/250-M; LMA-YDF-25/250-M; PLMA-GDF-25/250-M and LMA-GDF-25/250-M
7 Airport Park Road, East Granby, CT 06026 • 860.408.5000 • Toll-free 866.466.0214 • Fax 860.844.0210 E-mail info @ nufern.com • www.nufern.com •
Nufern products are manufactured under an ISO 9001:2008 certified quality management system.
Standard specifications and design parameters are listed above. Specifications are subject to change without notice. Other configurations such as alternative form factors, optimized cut-off and UV cured color
coating may be available. Let us know how Nufern can assist with your requirements.
NU0101- 11/07/2013