We report what is believed to be the first observation of a nonlinear mode in a cylindrical nonlinear Fabry–Perot cavity. The field enhancement from cavity buildup, as well as the large χ<sup>(3)</sup> optical nonlinearity that is due to resonantly excited <sup>85</sup>Rb vapor, allows the nonlinear mode to form at low incident optical powers of less than 1 mW. The mode is observed to occur for both self-focusing and self-defocusing nonlinearity.
© 1999 Optical Society of America
Jack Boyce, Juan P. Torres, and Raymond Y. Chiao, "Observation of a nonlinear mode in a cylindrical Fabry-Perot cavity," Opt. Lett. 24, 1850-1852 (1999)