Optical frequency comb light source and optical frequency comb generation method

An optical apparatus, comprising:

• an optical frequency comb light source, wherein the optical frequency comb light source comprises:
• a laser diode;
• a coupler comprising a first coupler input port, a second coupler input port, and a coupler output port, wherein the first coupler input port is connected to the laser diode;
• a Kerr nonlinear device comprising a Kerr input port and a Kerr output port, wherein the Kerr input port is connected to the coupler output port;
• a beam splitter comprising a beam splitter input port, a first beam splitter output port, and a second beam splitter output port, wherein the beam splitter input port is connected to the Kerr output port;
• and
• a phase shifter comprising a phase shifter input port and a phase shifter output port, wherein the phase shifter input port is connected to the first beam splitter output port;
• and
• a first optical amplifier, wherein the coupler output port is coupled to the Kerr input port such that the coupler output port is coupled to an input port of the first optical amplifier, and
• wherein the second beam splitter output port is configured to output an optical frequency comb.