Optical signal sending apparatus

An optical module, comprising:

• an optical signal sending apparatus including an optical modulator, a differential driver, and a phase modulator;
• and
• an optical signal receiving apparatus configured to receive an optical signal, wherein
• the optical modulator comprises:
• an optical input end;
• a first modulation region;
• a connection region;
• a second modulation region;
• and
• an optical output end, wherein;
• the first modulation region comprises a first modulation arm including a first optical waveguide and a second modulation arm including a second optical waveguide, and the second modulation region comprises a third modulation arm including a third optical waveguide and a fourth modulation arm including a fourth optical waveguide, electrodes being provided on two sides of each of the optical waveguides;
• the optical input end is configured to split input light into two paths and respectively output the two paths to the first and second optical waveguides of the first modulation region, the first modulation arm and the second modulation arm being configured to separately form an electric field between electrodes on two sides of each of the first and second optical waveguides and to modulate an optical signal in each of the first and second optical waveguides;
• the connection region is configured to connect the first modulation region and the second modulation region and to respectively input the optical signal from the first modulation arm and the optical signal from the second modulation arm to the third modulation arm and to the fourth modulation arm;
• the third modulation arm and the fourth modulation arm of the second modulation region are configured to separately form an electric field between electrodes on two sides of the third and fourth optical waveguides and to modulate an optical signal in each of the third and fourth optical waveguides;
• the optical output end is configured to combine and to output optical signals obtained through modulation in the third modulation arm and the fourth modulation arm;
• each electrode pair comprises a signal electrode and a ground electrode, the electrodes of each electrode pair being respectively disposed on the two sides of an associated optical waveguide and configured to form an electric field to modulate light in each of the optical waveguides, the signal electrodes comprising a positive signal electrode and a negative signal electrode;
• the differential driver comprises a positive signal output end and a negative signal output end and is configured to generate and separately output a differential drive signal to the signal electrode of the first modulation region and to the signal electrode of the second modulation region;
• and
• the phase modulator is configured to adjust a phase difference between the signals in the first modulation region and the signals in the second modulation region.

An optical communication device, comprising a laser and an optical signal sending apparatus, the laser being configured to output continuous light, and the optical signal sending apparatus comprises:

• an optical modulator;
• a differential driver;
• and
• a phase modulator, wherein:
• the optical modulator comprises:
• an optical input end;
• a first modulation region;
• a connection region;
• a second modulation region;
• and
• an optical output end, wherein;
• the first modulation region comprises a first modulation arm including a first optical waveguide and a second modulation arm including a second optical waveguide, and the second modulation region comprises a third modulation arm including a third optical waveguide and a fourth modulation arm including a fourth optical waveguide, electrodes being provided on two sides of each of the optical waveguides;
• the optical input end is configured to split input light into two paths and respectively output the two paths to the first and second optical waveguides of the first modulation region, the first modulation arm and the second modulation arm being configured to separately form an electric field between electrodes on two sides of each of the first and second optical waveguides and to modulate an optical signal in each of the first and second optical waveguides;
• the connection region is configured to connect the first modulation region and the second modulation region and to respectively input the optical signal from the first modulation arm and the optical signal from the second modulation arm to the third modulation arm and to the fourth modulation arm;
• the third modulation arm and the fourth modulation arm of the second modulation region are configured to separately form an electric field between electrodes on two sides of the third and fourth optical waveguides and to modulate an optical signal in each of the third and fourth optical waveguides;
• the optical output end is configured to combine and to output optical signals obtained through modulation in the third modulation arm and the fourth modulation arm;
• each electrode pair comprises a signal electrode and a ground electrode, the electrodes of each electrode pair being respectively disposed on the two sides of an associated optical waveguide and configured to form an electric field to modulate light in each of the optical waveguides, the signal electrodes comprising a positive signal electrode and a negative signal electrode;
• the differential driver comprises a positive signal output end and a negative signal output end and is configured to generate and separately output a differential drive signal to the signal electrode of the first modulation region and to the signal electrode of the second modulation region;
• and
• the phase modulator is configured to adjust a phase difference between the signals in the first modulation region and the signals in the second modulation region.