Observation of Degenerate Stimulated Four-Photon Interaction and Four-Wave Parametric Amplification

Abstract

mogeneously distributed stresses that would induce splitting of the J= 1 level. 7 T A in solid H 2 with high concentrations of ortho was first calculated by T. Moriya and K. Motizuki, Progr. •.Theoret. Phys. (Kyoto) 18_, 183 (1957). The calculation has been repeated recently by A. B. Harris and E. Hunt, Phys. Rev. Letters 16_, 845 (1966).

High-Power Solid State Lasers

“…Through this interaction, an intense be am can increase the index of refraction of the medium (solid, liquid, or gas) in which the be am is propagating. This causes self-focusing of the laser beam, because wherever the beam is most intense the refractive index increases, causing a locallenslike action that further increases the intensity of that portion of the be am [9]. The nonlinear response to the electrie field strength (a result of anharmonie electron motion) causes waves to be genera ted at harmonies of the frequency of the incoming beam [10].…”

High-power pulsed lasers

“…Growth of small-scale low-level beam ripples occurs because the non linear interaction causes power to transfer from the main-beam mode to the smaller-scale ripple modes via a parametric interaction. 65 Figure 35 schematically demonstrates the effect. Figure 36 shows the results of an experiment showing this effect.…”

Four-Wave-Mixing Enhancement in Optical Microfibers

“…This process allows for the conversion or amplification of coherent signals and has been demonstrated in a wide number of waveguides including optical fibers, microstructured fibers and dispersion shifted fibers [2][3][4][5][6]. As the process exploits the Kerr effect in a medium, it is more easily achieved in a medium with relatively high nonlinearity [7].…”