Polarization-dependent two-stage optical isolator for optical path multiplexing

The invention relates to a polarization-dependent two-stage optical isolator for optical path multiplexing, which comprises a packaging box, the inner wall of the packaging box is fixedly connected with a double-tail-fiber collimator, the inner wall of the double-tail-fiber collimator is fixedly connected with a capillary tube, the inner wall of the double-tail-fiber collimator is fixedly connected with a focusing lens, and the inner wall of the focusing lens is fixedly connected with a light source. The right end of the double-tail-fiber collimator is fixedly connected with a first polarization beam-splitting element, the outer surface of the first polarization beam-splitting element is fixedly connected with the inner wall of the packaging box, the inner side wall of the packaging box is fixedly connected with a reflector, and the inner wall of the packaging box is fixedly connected with a second polarization beam-splitting element. According to the optical isolator, the use of a wave plate is omitted, on t