1550nm Polarization Maintaining Optical Fiber

1550nm Polarization Maintaining Optical Fiber, PM1550 Fiber

FIRSOL’s 1550nm Polarization Maintaining Optical Fiber is designed for optical systems and components that require polarization preservation at 1550 nm. When linearly polarized light is properly launched along one of the fiber’s principal axes, the fiber helps maintain its polarization during propagation. Featuring attenuation of ≤0.5 dB/km, a beat length of ≤3.5 mm, and polarization crosstalk of ≤−30 dB over 1,000 m at 1550 nm, it combines low transmission loss with low coupling between polarization modes. The fiber has a mode field diameter of 6.0 ± 0.5 μm at 1550 nm, a cladding diameter of 125.0 ± 1.0 μm, and a coating diameter of 245.0 ± 5.0 μm. Its dual-layer UV-cured acrylate coating provides mechanical protection, while an operating temperature range of −45°C to +85°C supports integration into polarization-sensitive fiber optic assemblies across a wide range of operating environments.