Ultra-short pulse lasers in geological fluid inclusion analysis

This paper demonstrates second harmonic generation microscopy using an ultrashort pulse laser can be used to three-dimensionally image and determine the volume of fluid inclusions of arbitrary shape. Because of the phase matching conditions in a tightly focused beam, second harmonic light is only generated at the quartz-fluid inclusion interface, directly providing an image of the inclusion walls. A of a fluid inclusion reconstructed from a second harmonic generation image stack is reported.