Datasheet

Components & Accessories

LMA-GDF-25/250-M, Large Mode Area Matched Passive Double Clad Fiber

Product image of LMA-GDF-25/250-M, Large Mode Area Matched Passive Double Clad Fiber

Coherent Large Mode Area (LMA) matched passive double clad fibers are specifically designed for high power laser and amplifier systems. These fibers feature a 25 µm core diameter and a 250 µm cladding diameter, ensuring high coupling efficiency and low splice loss. The precision-matched (M) version enhances compatibility with active fibers and ensures optimal performance. The NuCOAT fluoroacrylate coating provides superior durability and long-term reliability, making these fibers ideal for demanding industrial, medical, and defense applications.

Features

  • Precision-matched design - Reduces splice loss
  • NuCOAT fluoroacrylate coating - Ensures long-term durability
  • Optimized for high power - Suitable for industrial laser systems
  • Proof tested to > 100 kpsi - Reliable performance
  • RoHS compliant

Applications

  • High power fiber lasers
  • Material processing
  • Defense and medical laser systems
Parameter LMA-GDF-25/250-M
Optical Specifications
Operating Wavelength 1060 - 1600 nm
Core NA 0.065 ± 0.005
Core Attenuation ≤ 30.0 dB/km @ 1200 nm
First Cladding NA ≥ 0.46
Cladding Attenuation ≤ 15.0 dB/km @ 1095 nm
Geometrical & Mechanical Specifications
Cladding Diameter 247.0 ± 3.0 μm
Core Diameter 25.0 ± 1.5 μm
Coating Diameter 395.0 ± 15.0 μm
Core Clad Offset ≤ 2.00 μm
Coating Material NuCOAT fluoroacrylate
Prooftest Level ≥ 100 kpsi (0.7 GN/m²)
Clad Non-Circularity ≤ 0.5 %