Smart Product Number: LMA-HDF-25/250
EyeSafe 25 Micron Core Holmium-Doped LMA Double Clad Fiber
True LMA fiber featuring a unique low NA (< 0.1) high concentration Ho-doped core design. The Ho-doped fiber can be pumped by a Tm-doped fiber laser at ~1950-nm and can achieve 60% efficiency. The high NA (0.46) large pump cladding waveguide allows for efficient coupling of high pump powers. The large core diameter (25 μm) maintains a large mode field diameter and short device length, thereby minimizing non-linear effects such as SBS and SRS.
Optical Specifications
Operating Wavelength
2100 – 2200 nm
Core NA
0.080 ± 0.010
First Cladding NA (5%) ≥ 0.46
Cladding Attenuation
≤ 15.0 dB/km @ 810 nm
Cladding Absorption
0.30 ± 0.20 dB/m at 1150 nm
Geometrical & Mechanical Specifications
Cladding Diameter (flat-to-flat) 250.0 ± 8.0 µm
Core Diameter
25.0 ± 2.0 µm
Coating Diameter
395.0 ± 15.0 µm
Core/Clad Offset
≤ 2.00 μm
Prooftest Level
≥ 100 kpsi (0.7 GN/m²)
Comments
Coating Requirements: Low-index polymer coating.
Features & Benefits
• Unique low NA Ho-doped core design — Robust single-mode beam quality
• NuCOAT fluoroacrylate coating — Greater fiber durability in extreme environmental operating & storage conditions
• High pump absorption — Short fiber length, efficient lasing in the ~2 μm window
Typical Applications
• High power CW and pulsed EyeSafe (~2 μm) lasers and amplifiers
• EyeSafe industrial and medical lasers
• Military and commercial LIDAR
• ~2 μm output TEM00 fiber lasers for pumping solid state crystal lasers
商品属性 [波长] 2100 - 2200 nm [掺杂类型] Ho [芯径大小] 25 µm [首包层直径] 250 µm [数值孔径] 0.080 [光学包层] Double