Application of Fiber In-Line Polarizers
https://www.feiyi-oeo.com/product-category/polarization-maintaining/pm-in-line-polarizer
Basic Function of Polarizers and Their Impact on Optical Systems. The primary function of a polarizer is to convert unpolarized natural light or composite light into polarized light with a specific orientation, thereby enhancing the purity of the optical signal and the stability of the system. It should possess a high polarization extinction ratio (PER) and low insertion loss.
A polarizer can essentially be considered a polarization mode selector. Only vibrations parallel to the polarization axis (the direction in which light vibrations are allowed to pass through the polarizer) are transmitted, while light perpendicular to this vibration direction is absorbed.
All-fiber polarizers are highly suitable for fiber optic networks and measurement applications, including polarization analysis, polarization monitoring and control, polarization mode dispersion (PMD) monitoring, and polarization extinction ratio (PER) improvement. They are extremely well-suited for polarization-maintaining fiber amplifiers, fiber lasers, high-speed communication systems, and instrumentation applications. Polarizers are often used in combination with various polarization devices.
