The LBTEK non-magnetic polarization-maintaining fiber collimator is precisely assembled from pigtails and lenses, capable of transforming the transmitted light within the fiber into collimated light or coupling external parallel light into the fiber. The collimator is encapsulated using PEEK material, a special engineering plastic with excellent properties such as high-temperature resistance, corrosion resistance, solvent resistance, anti-aging, and high mechanical strength, making it suitable for applications requiring non-magnetic devices. Products with different wavelengths and power levels can be customized according to customer needs and can be applied in fields such as fiber lasers, LiDAR, fiber sensing, and scientific research.