Smart Product Number: PS-GDF-20/400-M
20/400 NuMATCH LMA Double Clad Fibers
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 NuCOATFA coating technology for long life and excellent beam quality.
Optical Specifications
Operating Wavelength
1060 – 1600 nm
Core NA
0.065 ± 0.005
First Cladding NA (5%) ≥ 0.46
Core Attenuation
≤ 15.0 dB/km @ 1200 nm
≤ 30.0 dB/km @ 1300 nmCladding Attenuation
≤ 15.0 dB/km @ 1095 nm
Geometrical & Mechanical Specifications
Cladding Diameter
400.0 ± 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
≤ 0.5 %
First Cladding Material
Low Index Polymer
Prooftest Level
≥ 100 kpsi (0.7 GN/m²)
CommentsCoating Requirements: Low index polymer coating.
Photosensitivity Requirements: Photosensitive core.
Features & Benefits
Matched fiber series – ensure splice compatibility across the 20/400 matched series of fibers
High photosensitivity — Enables low cost, high yield grating fabrication
NuCOATFA 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
Typical Applications
Monolithic high power lasers & amplifiers
Ideal for Bragg gratings in laser applications
Military, industrial and medical
商品属性 [数值孔径] 0.065 [波长] 1060 - 1600 nm [芯径大小] 20 µm [首包层直径] 400 µm [光学包层] Double [掺杂类型] Ge