Abstract
The present invention discloses a multi-port reflection type optical isolator which comprises: plural pairs of optical input/output ports on the same side of the optical isolator, a polarization splitter/combiner, a non-reciprocal polarization rotation module, and a non-reciprocal reflector. The optical signal is incident from one of the optical input port into the optical isolator, and exits from a corresponding output port out of this optical isolator. Since the present invention utilizes a non-reciprocal reflector, the length of the optical isolator can be greatly shortened. Furthermore, array type optical input/output port design is adopted cooperatively, the function of having plural independent optical isolators with size comparable to current product is achieved.