Core features

1. High birefringence

The geometric asymmetry introduced by the stress zone produces strong birefringence, effectively separating two orthogonal polarization modes.

2. Polarization-maintaining performance

The polarization extinction ratio can reach more than 20dB.

Suitable for scenarios that require stable polarization states.

3. Wavelength dependence

The birefringence effect varies with wavelength, and the matching fiber model needs to be selected according to the working wavelength.

4. Mechanical stability

The stress zone structure reduces the sensitivity of the fiber to external bending and torsion, but excessive lateral pressure needs to be avoided.

Main application scenarios

1. Fiber sensing

Fiber gyroscope, hydrophone, stress/temperature sensor.

2. Laser system

Fiber amplifier, narrow linewidth laser.

3. Quantum communication

Polarization-encoded quantum key distribution system.