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6/125 Precision Matched Passive Single-Mode 1550-nm Double Clad Fiber

Nufern’s precision matched single-mode passive double-clad fibers are available in two-versions — PANDA-style, polarization-maintaining (PM) and non-PM. These fibers feature a 6 µm core diameter and a 125 µm clad diameter optimized to match Nufern's active Er/Yb 6/125 µm fibers. This precise matching allows for the lowest splice loss improving performance for all applications including telecom optical amplifiers at 1550 nm. They utilize the latest fiber design and NuCOAT coating technology to ensure excellent preservation of beam quality and extended operating life demanded by today’s industrial fiber laser applications.

Optical Specifications

Operating Wavelength

1530 – 1625 nm

Core NA

0.180

First Cladding NA(5%)

≥ 0.460

Mode Field Diameter

6.8 ± 0.8 µm @ 1550 nm

Cutoff

1440 ± 80 nm

Core Attenuation

≤ 6.00 dB/km @ 1550 nm

Cladding Attenuation

≤ 15.0 dB/km @ 1095 nm

Geometrical & Mechanical Specifications

Cladding Diameter

125.0 ± 1.0 µm

Core Diameter

6 µm

Coating Diameter

245.0 ± 10.0 µm

Coating Concentricity

< 5.0 µm

Core/Clad Offset

≤ 0.50 μm

Prooftest Level

≥ 100 kpsi (0.7 GN/m²)

Comments

Coating Requirements: Low Index Polymer Coating.
Other Requirements: Round Fiber

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Features & Benefits

NuCOAT fluoroacrylate coating — Greater fiber durability in extreme environmental operating & storage conditions
Exceptional uniformity and core/clad concentricity — Low connectorization losses
Bend insensitive — Survives application in tight confines
All fiber proof tested to > 100 kpsi — Critical for ensuring long term reliability

Typical Applications

Telecom amplifiers
Laser delivery/fluorescence

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.

Learn More

Call us at: 860-408-5000

Toll-free: 866-466-0214

Specification SheetDOWNLOAD

Optical Fibers

SM-GDF-6/125-M

6/125 Precision Matched Passive Single-Mode 1550-nm Double Clad Fiber