PS-GDF-20/400-M0 pages

20/400 Precision Matched
Photosensitive
Double Clad Fiber
Nufern's PS-GDF-20/400-M photosensitive fiber is precision matched to the active and passive 20/400-M fibers and is
designed for use in writing fiber Bragg gratings for fiber laser applications. Nufern's matched series of Large Mode Area
(LMA) double clad fibers are ideal for high power monolithic fiber lasers and amplifiers. Featuring a matching set of LMA
fibers, this series of fibers ensure splice compatibility across the entire chain of 20/400 fiber components, such as fiber
Bragg gratings and couplers, required to make monolithic fiber lasers. This matched fiber series is based on a 20 micron
diameter core and 400 micron diameter clad size with a low NA (0.06) core and consists of Yb-doped fiber, photosensitive
fiber and passive beam delivery fibers all made to highest tolerances in the industry. All fibers utilize the latest glass
composition and NuCOAT coating technology for long life and excellent beam quality.
Typical Applications

Features & Benefits

• Monolithic high power lasers &

• Matched fiber series – Ensures splice compatibility across the 20/400 matched series of fibers

amplifiers
• Ideal for Bragg gratings in laser
applications
• Military, industrial and medical

Optical Specifications
Operating Wavelength
Core NA
First Cladding NA (5%)
Core Attenuation
Cladding Attenuation

• High photosensitivity — Enables low cost, high yield grating fabrication
• NuCOAT™ fluoroacrylate coating — Greater fiber durability in extreme environmental operating & storage conditions
• All fiber proof tested to > 100 kpsi — Critical for ensuring long term reliability when coiling

PS-GDF-20/400-M
1060 – 1600 nm
0.065 ± 0.005
≥ 0.46
≤ 15.0 dB/km @ 1200 nm
≤ 30.0 dB/km @ 1300 nm
≤ 15.0 dB/km @ 1095 nm

Geometrical & Mechanical
Specifications
Cladding Diameter
Core Diameter
Coating Diameter
Core/Clad Offset
Clad Non-Circularity
First Cladding Material
Prooftest Level

400.0 ± 5.0 µm
20.0 ± 1.5 µm
550.0 ± 15.0 µm
≤ 2.00 µm
≤ 0.5 %
Low Index Polymer
≥ 100 kpsi (0.7 GN/m²)

The precision matched active and passive fibers are also available - see LMA-YDF-20/400-M and LMA GDF-20/400-M

7 Airport Park Road, East Granby, CT 06026 • 860.408.5000 • Toll-free 866.466.0214 • Fax 860.844.0210 E-mail info @ nufern.com • www.nufern.com •
Nufern products are manufactured under an ISO 9001:2008 certified quality management system.
Standard specifications and design parameters are listed above. Specifications are subject to change without notice. Other configurations such as alternative form factors, optimized cut-off and UV cured color
coating may be available. Let us know how Nufern can assist with your requirements.
NU0150- 11/07/2013