Picosecond laser fabrication of microchannels inside Foturan glass at CO2 laser irradiation and following etching

In this work, the formation of hollow-type microchannels in the bulk of a photostructurable glass of the brand Foturan is proposed. It is based on the chemical dissolution of crystallized areas, which are formed as a result of the action of picosecond laser pulses and photothermal treatment produced by CO 2 laser irradiation. A speed of formation of microchannels was estimated. Microchannels formation features at each stage of laser irradiation are discussed, and the dependence of microchannels characteristics (size, shape and roughness of inner walls) on laser processing and chemical etching parameters were evaluated as well.