U-Bench polarizer

A fiber polarization controller based on U-Bench, with two to three rotating optical supports between two collimators, can be used to control the polarization state of the light beam. For example, the first quarter wave plate can convert a circularly polarized beam into a linearly polarized beam. You can also insert a 1/2 wave plate to change the direction of linear polarization, and a 1/4 wave plate can change a linearly polarized beam to a circularly polarized beam or perform any type of polarization control function.