These fibers are designed for distributed temperature sensing applications. In the mid-temperature range up to 125 ºC for up to 20 years, select Geo50™ SA. When temperature requirements are higher, up to 300 ºC, choose Geo50. The fibers are protected against moisture and hydrogen ingression across the temperature range. They are resistant to water and chemicals, and cushioned for deployment and service in harsh environments.
Unit of Measure

Optical Properties


N/A Multimode Graded-Index

Numerical Aperture

N/A 0.20


N/A @ 1300 nm, ≥ 400 MHz-km@ 850 nm, ≥ 400 MHz-km


N/A @ 1300 nm, ≤ 2 dB/km@ 850 nm, ≤ 4 dB/km

Dimensions/Geometric Properties

Core Diameter

N/A 50 ± 3 µm

Clad Diameter

N/A 125 ± 2 µm

Coating Diameter

N/A 250 ± 10 µm

Cladding Non-Circularity

N/A ≤ 2.0%

Core Non-Circularity

N/A ≤ 5%

Core/Cladding Offset

N/A ≤ 3%

Crimp & Cleave Compatible

N/A No

Coating/Buffer Descriptions

Hermetic Carbon Layer

N/A 300 to 400 Å

Operating Temperature

N/A Continuous -45 to 125 ºC


Coating Material

N/A High-Temperature Silicone/Acrylate

Mechanical and Testing Data

Short-Term Bend Radius

N/A ≥ 8 mm

Long-Term Bend Radius

N/A ≥ 10 mm

Proof Test Level

N/A 100 kpsi.689 GPa

How To Order:

Order From Location

1.888.438.9936 toll-free in the United States and Canada
1.860.678.0371 from outside the U.S.A.
55 Darling Drive
Avon, CT 06001, USA

Order By Item #

N/A F18961-02

Typical Applications

N/A Datacom in Harsh Environments Distributed Temperature Sensing High-Temperature DTS Local Area Networks with Elevated Temperature Requirements


N/A Additional Coatings Cabling Connectorization Metalization Other Upgrades