Optical limitation in resonant Faraday media sandwiched between crossed polarizers is analyzed both theoretically and experimentally. In this technique resonant Faraday rotation permits a net transmission at low intensity levels, whereas the setup transmission is quenched at higher intensities when the active transition is completely saturated. This technique offers many advantages, such as a very low fluence threshold (∼12 nJ/cm<sup>2</sup> in cesium vapor), a high intensity range (more than 4 orders of magnitude for polarizer losses of 10<sup>-5</sup>), and quasi invulnerability to optical damage, which make this technique attractive for the protection of fixed-wavelength operated detectors.
© 2000 Optical Society of America
Robert Frey and Christos Flytzanis, "Optical limitation in resonant Faraday media," Opt. Lett. 25, 838-840 (2000)