Patent ID: 8640542

Claim:
A cantilever beam structural resonant-type integrated optical waveguide accelerometer, comprising input waveguide ( 1 ), asymmetric Mach-Zehnder interferometer ( 2 ), micro mechanical vibration cantilever beam ( 3 ), short curved waveguide ( 4 ), and output waveguide ( 5 ), characterized in that: the input waveguide ( 1 ), the asymmetric Mach-Zehnder interferometer ( 2 ), the micro mechanical vibration cantilever beam ( 3 ), the short curved waveguide ( 4 ), and the output waveguide ( 5 ) all comprise organic polymer substrate ( 12 ), organic polymer waveguide core layer ( 13 ), and organic polymer waveguide cladding ( 14 ); the inner ends of a first 2×2-port directional coupler ( 6 ) are respectively connected to a first short waveguide ( 71 ) and one end of the curved waveguide ( 4 ), the inner ends of a second 2×2-port directional coupler ( 10 ) are respectively connected to a second short waveguide ( 72 ) and the other end of the curved waveguide ( 4 ), and a phase modulator ( 9 ) is connected between the first short waveguide ( 71 ) and the second short waveguide ( 72 ), forming an asymmetric Mach-Zehnder interferometer ( 2 ); the input waveguide ( 1 ), the short curved waveguide ( 4 ), the output waveguide ( 5 ), the first 2×2-port directional coupler ( 6 ), the first short waveguide ( 71 ), the phase modulator ( 9 ), the second short waveguide ( 72 ), and the second 2×2-port directional coupler ( 10 ) are all fixed on a base 11 ; the outer ends of the first 2×2-port directional coupler ( 6 ) are respectively connected to the input waveguide ( 1 ) and one end of the long curved waveguide ( 8 ), the outer ends of the second 2×2-port directional coupler ( 10 ) are respectively connected to the output waveguide ( 5 ) and the other end of the long curved waveguide ( 8 ), the long curved waveguide ( 8 ) is integrated on the micro mechanical vibration cantilever beam ( 3 ); the micro mechanical vibration cantilever beam ( 3 ) has a twin-beam structure, which is formed through the connection between two parallel and symmetrically distributed micro-cantilever beams ( 16 ) and a mass block ( 17 ); one end of the micro-cantilever beams ( 16 ) is fixed on the base ( 11 ), and the other end of the micro-cantilever beams ( 16 ) is connected with the mass block ( 17 ); the mass block ( 17 ) is hung freely in the air.