PLMA-EYDF-25P/300-HE0 pages

25/300 Erbium/Ytterbium
Co-doped LMA Double Clad Fibers
Nufern's Large Mode Area (LMA) and Polarization Maintaining LMA (PLMA) Er/Yb co-doped fiber features a unique low
NA (0.09) core design, achieved without sacrificing high pump conversion efficiency and developed for applications where
robustly single-mode output beam quality is critical. The high NA (0.46) 300 μm cladding waveguide allows for efficient
coupling of high pump powers, while the large core diameter (25 μm) maintains a large-mode field diameter and short
device length thereby minimizing deleterious nonlinear effects such as SBS and SRS. They utilize the latest fiber design
and NuCOAT™ coating technology to ensure excellent preservation of beam quality and extended operating life at the high
power levels demanded by today’s industrial fiber laser applications.

Typical Applications

Features & Benefits

• Eye safe (1.5 μm) lasers and

• NuCOAT™ fluoroacrylate coating — Greater fiber durability in extreme environmental conditions

amplifiers
• Military and commercial lidar
• High peak power, pulsed fiber
amplifiers
• Ultra-short pulse fiber amplifiers

• Unique low NA Er/Yb co-doped core design — Few moded core, for robust SM beam quality
• Large-mode field diameter — Increased threshold for non-linearities
• Optimized, high efficiency core glass composition — Suitable for high power operation
• All fiber proof tested to > 100 kpsi — Critical for ensuring long term reliability when coiling

Optical Specifications

PLMA-EYDF-25P/300-HE

LMA-EYDF-25P/300-HE

Operating Wavelength
Core NA
First Cladding NA (5%)
Cladding Attenuation
Cladding Absorption
Core Absorption

1530 – 1625 nm
0.090
≥ 0.46
≤ 30.0 dB/km @ 1095 nm
2.90 ± 0.50 dB/m at 915 nm
85.0 ± 15.0 dB/m near 1535
nm
nominal 1.5 × 10⁻⁴

1530 – 1625 nm
0.090
≥ 0.46
≤ 30.0 dB/km @ 1095 nm
2.60 ± 0.50 dB/m at 915 nm
85.0 ± 15.0 dB/m near 1535
nm
N/A

300.0 ± 8.0 μm
N/A
25.0 ± 2.0 μm
450.0 ± 15.0 μm
≤ 2.00 μm
≥ 100 kpsi (0.7 GN/m²)

N/A
300.0 ± 8.0 μm
25.0 ± 2.0 μm
450.0 ± 15.0 μm
≤ 2.00 μm
≥ 100 kpsi (0.7 GN/m²)

Birefringence
Geometrical & Mechanical
Specifications
Cladding Diameter
Cladding Diameter (flat-to-flat)
Core Diameter
Coating Diameter
Core/Clad Offset
Prooftest Level

The passive version of each fiber is also available - see PLMA-GDF-25/300 and LMA-GDF-25/300

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.
NU0161- 11/07/2013