The LBTEK Polarization-Maintaining Fiber Faraday Mirror is primarily fabricated utilizing the Faraday magneto-optic effect. The device comes with built-in polarization-maintaining single-mode fiber and can be applied in polarization-maintaining optical systems. Polarized light is input from the polarization-maintaining fiber connector, and the divergent light emitted from the fiber is converted into collimated light via a collimator. After passing through the Faraday rotator mirror, the polarization state rotates by 45°. Upon reflection by the mirror, the light retraces its path and passes through the Faraday rotator mirror again. Under the Faraday magneto-optic effect, the polarization rotation direction remains the same as that of the incident light, resulting in an additional 45° rotation. The reflected light thus exhibits a polarization state orthogonal (90°) to that of the incident light and is finally coupled back into the original fiber via the collimator for output. It is mainly used in fiber amplifiers, fiber lasers, fiber sensing, and other fields. LBTEK offers various customization services, including wavelength, fiber type, rotation angle, and connector customization. For specific customization requirements, please contact LBTEK Technical Support.