2results about How to "Save plane space" patented technology

The application discloses a wide-range continuous frequency modulation narrow-line-width laser, which comprises a laser chip, a micro-ring cavity and a coupling waveguide. The laser chip comprises a light-emitting waveguide, is used for generating laser, and transmits the laser to an output end of the laser chip through the light-emitting waveguide. The coupling waveguide is arranged below the laser chip, is coupled with the light-emitting waveguide, and comprises a coupling point coupled with the micro-ring cavity. The distance between the coupling point and the micro-ring cavity is smaller than the distance between the two ends of the coupling waveguide and the micro-ring cavity. The laser chip is arranged above the coupling waveguide and the micro-ring cavity, the feedback loop is greatly shortened, the tuning range is expanded, and the influence of phase change on the continuous tuning range is reduced.