Flow rate based control of wavelength emission in a multicolor microfluidic dye laser

An original method is investigated to monitor the emission of a microfluidic dye laser. It relies on the flow rate of a dye mixture solution. The two dyes are at the origin of laser effects at two distinct wavelengths. In function of the dye mixture flow rate, one wavelength or the other can be selected. The purpose is to achieve a wavelength on-demand system which would be of great interest for spectroscopic analysis of biochemical samples.