Laser assembly packaging for silicon photonic interconnects

An apparatus comprising:

• a laser assembly configured to emit laser light from an output side of the laser assembly, wherein the output side of the laser assembly comprises an output grating through which the laser assembly is configured to output the laser light;
• a laser diode included in the laser assembly, wherein the laser diode is configured to generate the laser light;
• a silicon interposer (SiP), wherein an input side of the SiP is coupled to the output side of the laser assembly by a plurality of solder bumps;
• an input grating included on the input side of the SiP, wherein the input grating is configured to redirect the laser light through a silicon layer of the SiP, wherein a distance between the output grating and the input grating of the SiP is less than 100 microns.

A method comprising:

• generating laser light by applying an electrical current to a laser diode included in a laser assembly;
• emitting the laser light from an output side of the laser assembly, wherein the output side of the laser assembly is coupled to an input side of a silicon interposer (SiP) by a plurality of solder bumps;
• redirecting, by an input grating positioned on the input side of the SiP, the laser light through a silicon layer of the SiP towards an output grating of the SiP;
• emitting the laser light from the output grating of the SiP towards a lens included in a lens assembly that is coupled to the SiP;
• measuring, at a sensor incorporated into the SiP, a quantity associated with the laser light;
• sending, through a first through-silicon via (TSV) in the SiP, one or more sensor readings collected during the measurement to an application-specific integrated circuit (ASIC);
• determining, at the ASIC based on the sensor readings, an adjustment for an operating parameter of the laser assembly;
• sending, through a second TSV in the SiP, an indication of the adjustment to the laser assembly;
• and
• updating the operating parameter at the laser assembly in accordance with the adjustment.