The TruePhase 14xx Polarization Maintaining Optical Fibers are optimized for operation in the 1400 – 1490 nm band which is of interest for Raman amplification enabling delivery of high stable output power in this wavelength range.

The main optical characteristics are listed in the table below.

The TruePhase 14xx is available in 2 versions with respect to Optical Birefringence. The standard option (HBL – High Beat Length) is specified with a Beat Length of 3.7 mm – 4.7 mm @ 1455 nm, while the Low Beat Length (LBL) version has a Beat Length < 4.2 mm @ 1455 nm.

The standard option is available coating having a diameter of 250 µm and 400 µm respectively. Both versions can be supplied proof tested to 100 kpsi or 200 kpsi depending on the application in mind.

Unit of Measure

Optical Properties

Mode Field Diameter

N/A @ 1455 nm, 9.8 µm


N/A ≤ 1.2 dB/km @ 1455 nm

Beat Length

N/A 3.7 - 4.7 mm @ 1455 nm

Numerical Aperture

N/A 0.13


N/A Polarization-Maintaining

Cutoff Wavelength

N/A ≤ 1390 nm


N/A ≤ -30 dB / 100 m @ 1550 nm

Crosstalk (Typical)

N/A ≤ -35 dB / 100 m @ 1550 nm

Dimensions/Geometric Properties

Cladding Diameter

N/A 125 ± 1.0 µm

Coating Diameter

N/A 250 ± 10 µm

Coating Type

N/A Dual UV Acrylate

Core/Clad Offset

N/A ≤ 0.5 µm

Clad Non-Circularity

N/A ≤ 2.0%

Mechanical and Testing Data

Proof Test Level

N/A ≥ 200 kpsi1.38 GPa

Operating Temperature

N/A -40 to +85 ºC


Operating Wavelength

N/A 1400 to 1490 nm

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 BF06832-06

Typical Applications

N/A Polarization-sensitive components in advanced communication systems Raman Gain Modules Raman Pump Combiners or Pump Multiplexors Raman Pump Pigtails


N/A Cabling Coating Material and Dimensions Metalization Optical Properties Proof Test