Optical modulation device and laser apparatus

A laser apparatus comprising:

• a laser emitter;
• and
• an optical modulation device arranged on a light-emitting side of the laser emitter and including:
• a waveguide layer including a waveguide body and a plurality of nano-waveguides embedded in the waveguide body and extending in an extension direction, the direction being a light-emitting direction of the laser emitter;
• a first electrode layer arranged on a side of the waveguide layer and including a plurality of first electrodes extending along the extension direction and arranged in a one-to-one correspondence with the plurality of nano-waveguides;
• and
• a second electrode layer arranged on a side of the waveguide layer facing away from the first electrode layer and including a plurality of second electrodes extending in the extension direction and arranged in a one-to-one correspondence with the plurality of first electrodes, each of the plurality of second electrodes and a corresponding one of the plurality of first electrodes being configured to apply a modulation voltage to a corresponding one of the plurality of nano-waveguides to change a refractive index of the corresponding one of the plurality of nano-waveguides.