IdealPhotonics' single-mode polarized fiber is a type of fiber that uses a high birefringence structure (such as a stress region or elliptical core) to forcibly lock the polarization direction of light waves during single-mode transmission. While maintaining low single-mode loss characteristics, it achieves a polarization extinction ratio >20dB, specifically designed for applications with stringent polarization stability requirements, such as fiber optic gyroscopes and quantum communication."Integrated single-mode transmission and polarization locking," through a high birefringence structure (such as a panda-shaped/elliptical core), achieves a polarization extinction ratio >25dB while maintaining single-mode characteristics, providing a polarization-stable transmission channel for ultra-high-precision systems such as interferometry and quantum key distribution.