Degenerate Frequency Two-Beam Coupling in Organic Media via Phase Modulation with Nanosecond PulsesJournal of the Optical Society of America B
AbstractThis work presents a theoretical treatment using population redistribution and the thermo-optic effect to mediate degenerate frequency two-beam coupling (TBC) in the nanosecond regime in third-order nonlinear organic solutions. We show experimentally that the energy transfer is indeed a result of TBC and can be modeled using self- and cross-phase modulation to produce the required frequency shift. As a result of the relatively long lifetimes and large phase shifts induced by population redistribution and thermo-optic effects, the coupling efficiency can be significant. For the special case when a single input beam is aligned to overlap with the Fresnel reflection of the sample/air interface, coupling efficiencies can easily exceed 50% of the incident pump energy, which can account for a severe deleterious effect in nonlinear transmission experimentation.
CopyrightCopyright © 2016, Optical Society of America
PublisherOptical Society of America
Citation InformationJonathan E. Slagle, Joseph W. Haus, Shekhar Guha, Daniel G. McLean, et al.. "Degenerate Frequency Two-Beam Coupling in Organic Media via Phase Modulation with Nanosecond Pulses" Journal of the Optical Society of America B Vol. 33 Iss. 2 (2016)
Available at: http://works.bepress.com/joseph_haus/29/