Propagation of Ultrafast Laser Pulses
	Propagation of an ultrafast laser through a transparent material can lead to:
			•  Pulse broadening •  Pulse delay •  Chirp
				•   Material dispersion is positive. •   A prism (or a grating) pair can have both positive or negative dispersion •   By using a pair of prisms (or gratings) one can control net cavity dispersion.