Smart Product Number: LMA-EYDF-30P/250-HE
Erbium/Ytterbium-Doped LMA Double Clad Fibers
Nufern's Large Mode Area (LMA) and Polarization Maintaining LMA (PLMA) Er/Yb co-doped fibers feature 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) cladding waveguide (250 and 300 μm) allows for efficient coupling of high pump powers, while the large core diameters (25 and 30 μm) maintain a large-mode field diameter and short device length thereby minimizing deleterious nonlinear effects such as SBS and SRS. The design of these LMA products has been finely tuned to achieve ultra-high efficiencies while suppressing parasitic effects at 1 μm, offering unmatched stability when operating at high powers. Utilizing the NuCOAT™ coating technology, these LMA fibers provide excellent preservation of beam quality and extended operating life at the high power levels demanded by today’s industrial fiber laser applications.
Optical Specifications
Operating Wavelength
1530 – 1625 nm
Core NA
0.090
First Cladding NA (5%) ≥ 0.46
Cladding Attenuation
≤ 30.0 dB/km @ 1095 nm
Cladding Absorption
6.00 ± 1.00 dB/m at 915 nm
Core Absorption
100.0 ± 20.0 dB/m near 1530 nm
Geometrical & Mechanical Specifications
Cladding Diameter (flat-to-flat) 250.0 ± 8.0 µm
Core Diameter
30.0 ± 3.0 µm
Coating Diameter
350.0 ± 10.0 µm
Core/Clad Offset
≤ 3.00 μm
Coating Material
Low Index Acrylate
Prooftest Level
≥ 100 kpsi (0.7 GN/m²)
Comments
Coating Requirements: Low Index Polymer NuCOATFA
商品属性 [波长] 1530 - 1625 nm [掺杂类型] Er/Yb [芯径大小] 30 µm [首包层直径] 250 µm [数值孔径] 0.090 [光学包层] Double