The utility model provides a planar optical wave loop which is provided with a waveguide optical functional loop formed on a base. The planar optical wave loop is characterized by comprising a waveguide field and a fixing seat frame, wherein the waveguide field is connected with one edge of an emergency end face of an optical waveguide for forming emergency light from the optical functional loop to exit and an incidence end face of an optical waveguide for forming incident light to the optical functional loop to enter so as to form the optical waveguide; and the fixing seat frame is only fixedly arranged at the bottom surface of the base at the part at which the waveguide field is formed to keep the planar optical wave loop. The utility model aims to provide the planar optical wave loop capable of simultaneously inhibiting the optical axis deflection caused by the temperature variation and the characteristic deterioration of the optical functional loop in an integrated optical receiver or optical transmitter.