Laser wavelength tracking via direct laser measurement and optical filters in a spectrometer

摘要

An optical system is described where a portion of the Rayleigh light arriving from a sample is incident on the same image sensor as a Raman signal to be measured. As a result, the difference in wavelength between the measured Rayleigh line and the measured Raman peaks may be determined directly without the need for a separate sensor, optical path, or calibration.