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Part #:
LMA-YDF-25/250
25/250 Ytterbium-Doped LMA Double Clad Fiber
Nufern’s 25/250 Ytterbium-doped double clad fiber is ideally suited for pulsed fiber amplifier applications. Based on a waveguide structure that supports fewer 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.
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Optical Specifications | |
| Operating Wavelength | 1060–1115 nm |
| Cladding Absorption | 1.7 ± 0.3 dB/m @ 915 nm 5.5 dB/m @ 975 nm (nominal) |
| Core Numerical Aperture | 0.06 ± 0.01 |
| Cladding Numerical Aperture (nominal) | 0.46 |
Geometrical & Mechanical Specifications | |
| Core Diameter | 25.0 ± 2.5 µm |
| Clad Diameter | 250.0 ± 10.0 µm |
| Coating Diameter | 400 ± 20 µm |
| Outer Cladding Material | Low Index Polymer |
| Proof Test Level | ≥ 100 kpsi (0.7 GN/m2) |
Note: Perfectly matched passive versions are available for many of our active fibers.
See our
Component and Delivery Fibers cheat sheet. (PDF)
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