Fluorescence and systemic noise reduction in time-gated spectroscopy

A system for reducing fluorescence and systematic noise in time-gated spectroscopy, the system comprising:

• a processor;
• and
• a memory, the memory communicatively coupled to the processor and storing instructions executable by the processor to perform a method, the method comprising:
• providing first light using an excitation light source;
• receiving, by a detector, first scattered light from a material responsive to the first light during a first time window having a first duration, the first scattered light having substantial Raman signal, the first scattered light having a first wavelength;
• detecting a peak intensity of the first scattered light;
• receiving, by the detector, second scattered light from the material responsive to the first light during a second time window having a second duration, the second scattered light having little Raman signal, the second scattered light having the first wavelength;
• detecting a peak intensity of the second scattered light;
• providing second light using the excitation light source;
• receiving, by the detector, third scattered light from the material responsive to the second light during a third time window having the first duration, the third scattered light having substantial Raman signal, the third scattered light having a second wavelength;
• detecting a peak intensity of the third scattered light;
• receiving, by the detector, fourth scattered light from the material responsive to the second light during a fourth time window having the second duration, the fourth scattered light having little Raman signal, the fourth scattered light having the second wavelength;
• detecting a peak intensity of the fourth scattered light;
• recovering a spectrum of the material by taking a ratio of the peak intensity of the first scattered light and the peak intensity of the second scattered light, and taking a ratio of the peak intensity of the third scattered light and the peak intensity of the fourth scattered light;
• and
• identifying at least one molecule of the material using the recovered spectrum and a database of identified spectra.

A system for reducing fluorescence and systematic noise in time-gated spectroscopy, the system comprising:

• means for providing first light using an excitation light source;
• receiving, by a detector, first scattered light from a material responsive to the first light during a first time window having a first duration, the first scattered light having substantial Raman signal, the first scattered light having a first wavelength;
• means for detecting a peak intensity of the first scattered light;
• means for receiving, by the detector, second scattered light from the material responsive to the first light during a second time window having a second duration, the second scattered light having little Raman signal, the second scattered light having the first wavelength;
• means for detecting a peak intensity of the second scattered light;
• means for providing second light using the excitation light source;
• means for receiving, by the detector, third scattered light from the material responsive to the second light during a third time window having the first duration, the third scattered light having substantial Raman signal, the third scattered light having a second wavelength;
• means for detecting a peak intensity of the third scattered light;
• means for receiving, by the detector, fourth scattered light from the material responsive to the second light during a fourth time window having the second duration, the fourth scattered light having little Raman signal, the fourth scattered light having the second wavelength;
• means for detecting a peak intensity of the fourth scattered light;
• means for recovering a spectrum of the material by taking a ratio of the peak intensity of the first scattered light and the peak intensity of the second scattered light, and taking a ratio of the peak intensity of the third scattered light and the peak intensity of the fourth scattered light;
• and
• means for identifying at least one molecule of the material using the recovered spectrum and a database of identified spectra.