A 60.9-degree polarization rotation on the Poincare sphere produced by the anisotropic response of a nonlinear Fabry-Perot resonator is leveraged with an in-line polarizer to achieve a 31.2-dB-contrast optical AND gate.
The frequency dependence of the Fabry-Perot cavity response to the weak modulation of the birefringence of an intracavity element is analyzed. It is shown that the polarization modulation of light at the exit of the cavity reveals resonant features at frequencies multiple of the intermode beat frequency of the cavity. The possibilities of applying this effect for the selective amplification of high-frequency oscillation of the medium anisotropy are considered. The prospects for creating spectrometers of HF birefringence with the cavity-enhanced amplification of the signal are discussed and a scheme of the all-optical spin noise spectrometer is proposed.
The combination of polarization optics and nonlinear optics gives rise to interesting new physical phenomena1. In the work presented here we will focus on planar resonators with a nonlinearity of diffusive nature, such as the nonlinear Fabry-Perot resonator (NLFP). There are two ways to display the role of polarization in the bistable response of such a device. First, in a configuration where the light wave is obliquely incident on the resonator, as the interface's reflectances depend on the polarization state of the incident light. Second, in a configuration where the beam impinges normally on a resonator now filled with an anisotropic material, as a phase shift is induced between the linear Airy resonances of the two polarization eigenmodes. In this paper, two dynamic theories for planar resonators are presented for both configurations mentioned above, for an arbitrary polarization of the incident plane wave.