Abstract: The present invention relates to an integrated optical fiber collimator with a built-in polarizing beam splitter. An embodiment of the present invention includes a housing, an optical fiber, a collimating lens system that includes at least one lens, and a polarizing beam splitter. The optical fiber terminates in the housing at an optical fiber termination. The collimating lens system is in the housing and is in optically communication with the optical fiber through the optical fiber termination. The housing mechanically supports the polarizing beam splitter. The polarizing beam splitter separates the light from the optical fiber into two substantially orthogonally polarized light beams and substantially couples two orthogonally polarized light beams to the optical fiber in conjunction with the collimating lens system.