Optical module and fabrication method thereof

A method for fabricating an optical module, comprising:

• growing an epitaxial material of a laser on a substrate;
• etching the epitaxial material of the laser to acquire the laser and an electro-absorption modulator window;
• growing an epitaxial material of an electro-absorption modulator in the electro-absorption modulator window on the substrate;
• etching the epitaxial material of the electro-absorption modulator to acquire an electro-absorption modulator and a semiconductor optical amplifier window, wherein the electro-absorption modulator is located between the laser and the semiconductor optical amplifier window;
• growing an epitaxial material of a semiconductor optical amplifier in the semiconductor optical amplifier window on the substrate;
• etching the epitaxial material of the semiconductor optical amplifier to acquire a semiconductor optical amplifier, wherein the electro-absorption modulator is located between the laser and the semiconductor optical amplifier;
• and
• assembling an optical component on one side of the semiconductor optical amplifier, and ensuring that the semiconductor optical amplifier is located between the electro-absorption modulator and the optical component;
• wherein:
• the laser outputs an optical signal after power-on;
• the electro-absorption modulator performs signal modulation on the optical signal output by the laser;
• the semiconductor optical amplifier amplifies the optical signal modulated by the electro-absorption modulator;
• the optical component performs deflection and convergence for the optical signal amplified by the semiconductor optical amplifier and outputs the optical signal.