Low-PDL beam splitter

摘要

A beam splitter comprises a splitting device (60) receiving at a first surface (60A) a first incident beam (40) in an angle alpha with respect to the optical axis. A portion (70) of the first incident beam (40) will be reflected at the first surface (60A) at the angle alpha to the optical axis on opposite side with respect to the first incident beam. A second beam (80) will be transmitted through the splitting device (60). The angle alpha is selected that the reflected portion (70) is substantially independent of the state of polarization of the first incident beam (40).