Five-port optical router with low insertion loss

The invention discloses a five-port optical router with low insertion loss. The optical router comprises twelve micro ring resonators, six optical waveguides, five input ports, five output ports and two terminal nodes. The first end input port to the second end output port is a first optical waveguide; the second end input port to the first end output port is a second optical waveguide; the thirdend input port to the fifth end output port is a third optical waveguide; the fifth end input port to the third end output port is a fourth optical waveguide; the fourth end input port to the first terminal node is a fifth optical waveguide; the second terminal node to the fourth end output port is a sixth light waveguide. The optical router utilizes the resonance characteristics of the micro ringresonators to the specific wavelength to skillfully combine the micro ring resonators and the optical waveguides, so that the non-blocking routing exchange of the five bidirectional ports is achieved, the structure of the opt