Wearable spectroscopy using filtered sensor

A system for spectroscopy comprising:

• a processor;
• and
• a memory communicatively coupled to the processor, the memory storing instructions executable by the processor to perform a method, the method comprising:
• illuminating, with a tunable laser, an analyte with a first light, the first light having a first excitation wavelength;
• detecting, with a filtered sensor, a first Raman signal, the filtered sensor being a single photon avalanche diode array detector;
• illuminating, with the tunable laser, the analyte using a second light, the second light having a second excitation wavelength, the second excitation wavelength being larger than the first excitation wavelength by a first predetermined increment;
• detecting, with the filtered sensor, a second Raman signal, the second Raman signal being shifted from the first Raman signal by a second predetermined increment;
• illuminating, with the tunable laser, the analyte using a third light, the third light having a third excitation wavelength, the third excitation wavelength being larger than the second excitation wavelength by the first predetermined increment;
• detecting, with the filtered sensor, a third Raman signal, the third Raman signal being shifted from the second Raman signal by the second predetermined increment, wherein the first Raman signal, the second Raman signal, and the third Raman signal are directly passed by a beam splitter from the analyte to the filtered sensor;
• constructing a Raman spectrum using the first Raman signal, the second Raman signal, and the third Raman signal;
• and
• determining at least one molecule of the analyte using the Raman spectrum and a database of predetermined Raman spectra.

A system for spectroscopy comprising:

• means for illuminating an analyte with a first light, the first light having a first excitation wavelength;
• means for detecting a first Raman signal, a filtered sensor being a single photon avalanche diode array detector;
• means for illuminating the analyte using a second light, the second light having a second excitation wavelength, the second excitation wavelength being larger than the first excitation wavelength by a first predetermined increment;
• means for detecting a second Raman signal, the second Raman signal being shifted from the first Raman signal by a second predetermined increment;
• means for illuminating the analyte using a third light, the third light having a third excitation wavelength, the third excitation wavelength being larger than the second excitation wavelength by the first predetermined increment;
• means for detecting a third Raman signal, the third Raman signal being shifted from the second Raman signal by the second predetermined increment, wherein the first Raman signal, the second Raman signal, and the third Raman signal are directly passed by a beam splitter from the analyte to the filtered sensor;
• means for constructing a Raman spectrum using the first Raman signal, the second Raman signal, and the third Raman signal;
• and
• means for determining at least one molecule of the analyte using the Raman spectrum and a database of predetermined Raman spectra.