Fluid analysis and monitoring using optical spectroscopy

A system configured to control a Raman sub-sampling system, the system comprising:

• a processor circuit configured to perform operations comprising:
• performing a plurality of spectroscopic measurements, each spectroscopic measurement comprising:
• controlling a power supply of an excitation source to provide one of a plurality of power values to the excitation source to thereby cause the excitation source to generate incident radiation having one of a plurality of intensity values;
• receiving a signal from a detection system representing radiation scattered/emitted from a sample of an opaque fluid in response to the sample of the opaque fluid having received the incident radiation from the excitation source;
• determining a metric for the received signal, wherein the metric is based on a processing model that characterizes the signal in terms of a presence of features indicative of Raman scattering and/or features indicative of fluorescence;
• determining an optimum intensity value of incident radiation as the intensity value of one of the plurality of spectroscopic measurements for which the metric has a largest value;
• and
• performing a Raman spectroscopy measurement on the sample using incident radiation having the optimum intensity, generated by the excitation source, to thereby generate a Raman spectrum for the sample.