Tunable hybrid III-V/IV laser sensor system-on-a chip for real-time monitoring of a blood constituent concentration level

An optical sensor for use in wearable devices, the optical sensor comprising:

• a III-V semiconductor-based gain-chip,
• at least one group III-V photodiode,
• a group-IV semiconductor based photonic integrated circuit comprising an array of lasers, wherein each laser of the array of lasers is targeted at a different spectral region,
• a plurality of optical elements, each optical element coupled to at least one laser of the array of lasers, the plurality of optical elements comprising one or more optical manipulation devices comprising at least a Vernier-filter, a ring resonator, a mirror, and a multiplexer;
• and
• at least one interface coupled to each laser of the array of lasers and the at least one interface configured to transmit light from each laser of the array of lasers to a target.

An optical sensor for use in wearable devices, the optical sensor comprising:

• a III-V semiconductor-based gain-chip,
• at least one group III-V photodiode,
• a group-IV semiconductor based photonic integrated circuit comprising an array of lasers, wherein each laser of the array of lasers is targeted at a different spectral region,
• a plurality of optical elements, each optical element coupled to at least one laser of the array of lasers, the plurality of optical elements comprising one or more optical manipulation devices;
• at least one interface coupled to each laser of the array of lasers and the at least one interface configured to transmit light from each laser of the array of lasers to a target;
• and
• a processor;
• wherein the optical sensor is configured to:
• receive reflected light from the target via the at least one interface;
• apply a pre-trained algorithm to the received reflected light to convert the reflected light from the target into an electrical signal;
• convert, using the electrical signal, the reflected light from the target into an absorbed light at the target, the absorbed light at the target comprising a complex absorption spectrum;
• determine a water concentration level of the target using the complex absorption spectrum;
• remove a baseline from the complex absorption spectrum, the baseline calculated based on the determined water concentration level;
• decompose the complex absorption spectrum;
• and
• based on the decomposition of the complex absorption spectrum, determine a concentration level of at least one analyte at the target.