The invention relates to a
bridge type surface acoustic wave transducer in a micro-optical-electro-mechanical
gyroscope. An embedded strip-shaped acoustic-optical
waveguide region is produced on a substrate material, the
bridge type surface acoustic wave transducer is further provided with a pressure
welding electrode, interdigital electrodes and a bridging
electrode,
electrode structures of the interdigital electrodes are divided into two groups and respectively positioned on the upper side and the lower side of the acoustic-optical
waveguide region with the interval of less than six
sound wave wavelengths, and the two groups of the interdigital electrodes are connected through the bridging electrode and penetrate the acoustic-optical
waveguide region. When a driving power supply is imposed between the upper group and the lower group of the
surface acoustic wave interdigital electrodes for generating surface acoustic
waves, an
acoustic wave field of the acoustic-optical waveguide region and the region of the interdigital electrodes are completely uniform and consistent, thereby leading acoustic waveguide of the acoustic-optical waveguide region to have no
sound field mutation. Thebridge type surface
acoustic wave transducer adopts the bridging form for reducing the area of a
metal electrode of acoustic-optical waveguide under the premise of keeping the
acoustic wave field ofan acoustic-optical active region unchanged, thereby not only keeping the characters of the acoustic
wave field, but also effectively reducing the absorption of optical
waves of the
metal electrode.