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20/400 NuMATCH LMA Double Clad Fibers

20/400 NuMATCH LMA Double Clad Fibers

 Nufern's Large Mode Area (LMA) and Polarization Maintaining LMA (PLMA) passive double clad fiber are ideal for high power fiber lasers and amplifiers used in military, industrial, and medical applications.  These fibers feature a 20 micron diameter core and 400 micron diameter clad size with a low NA (0.065) core.  They are precision matched to their active Yb-doped 20/400 LMA and PLMA matched counterparts to ensure excellent splice compatability and low loss.  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.  They utilize the latest fiber design and NuCOATFA 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.  These precision matched fibers are available in both non-PM and PANDA-style PM fibers.

Optical Specifications
Operating Wavelength 1060 – 1600 nm
Core NA 0.065 ± 0.005
First Cladding NA (5%) ≥ 0.46
Core Attenuation ≤ 12.0 dB/km @ 1300 nm
≤ 8.0 dB/km @ 1200 nm
Cladding Attenuation ≤ 15.0 dB/km @ 1095 nm
Geometrical & Mechanical Specifications
Cladding Diameter 395.0 ± 5.0 µm
Core Diameter 20.0 ± 1.5 µm
Coating Diameter 550.0 ± 15.0 µm
Core/Clad Offset ≤ 2.00 μm
Clad Non-Circularity ≤ 0.50 %
Prooftest Level ≥ 100 kpsi (0.7 GN/m²)

Coating Requirements: Low index polymer coating.

$43.20 per meter meter(s)
Spooling Options:
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Optical Fibers
Fiber Lasers
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Typical Applications
Features & Benefits
  • High power fiber lasers
  • CW and pulsed amplifiers
  • Military, industrial and medical
  • NuCOATFA fluoroacrylate coating — Greater fiber durability in extreme environmental operating & storage conditions
  • LMA core design — Useful for transmitting high CW powers
  • “Few” moded core design — Easy to maintain single mode LP01 beam through fiber & components
  • PANDA-style stress structure for increased birefringence — Superior optical performance and uniformity
  • All fiber proof tested to > 100 kpsi — Critical for ensuring long term reliability when coiling

Nufern’s optical fiber products, including rare-earth doped, gyro, polarization-maintaining, radiation resistant, photosensitive, multimode and single mode, and any other optical fiber product including custom optical fibers, may be covered by one or more of the following pending or issued U.S. Patents, each of which is owned by or licensed by Nufern:

6,779,364; 6,832,026; 6,904,214; 6,950,586; 7,003,206; 7,050,686; 7,062,137; 7,110,647; 7,116,887; 7,167,621; 7,317,857; 7,371,019; 7,386,210; 7,400,812; 7,483,610; 7,634,164; 7,724,422; 5,949,941 (licensed from Furukawa Electric Co. of North America).

Moreover, use of Nufern’s optical fiber products, including modifications thereof, combinations with other products, or certain specific uses can necessitate additional customer licensing, particularly with respect to U.S. Patent nos. 5,818,630 (IMRA America, Inc.) and 6,496,301 (The United States of America as represented by the Secretary of the Navy).  See the terms and conditions specific to your purchase.

RoHS Compliant