wavelength multiplexing


How to choose a laser for Raman Spectroscopy

In specific spectroscopy techniques like the Raman or LIBS (Laser-Induced Breakdown Spectroscopy) ones, the choice of the color and of the optical specifications of the excitation laser can be very important. The Raman spectrum of a material or a gas sample represents the energy shift of its vibration modes in relation to the laser excitation and is usually expressed in wavenumbers (cm-1 unit). In Raman spectroscopy, the effective radiated power varies as the excitation frequency to the fourth (due to the…