Self-focusing and beam breakup. Read carefully the subsection that includes Eqs. (7.1.41) through (7.1.43) and write a short essay (one or two paragraphs) describing how you would proceed to observe filamentation in the laboratory making use of a laser pulse of 10 nsec duration (assumed for simplicity to have a square-top time evolution) and making use of the nonlinear response of carbon disulfide. Describe issues such as the pulse energy that is required, the length of the interaction region you would use, and the focusing characteristics of your laser beam.
