Stable spatial laser patterns were observed in a high-finesse Fabry–Perot cavity containing up to 2 atm of CO2 and O2. The gases displayed the same sequence of patterns that obey a scaling law of the form Pβp2, where P is the power stored in the cavity, p is the pressure of the gas, and β is a material-dependent parameter.
© 2001 Optical Society of America
Sean J. Bentley, Robert W. Boyd, William E. Butler, and Adrian C. Melissinos, "Spatial patterns induced in a laser beam by thermal nonlinearities," Opt. Lett. 26, 1084-1086 (2001)